{"id":4406,"date":"2026-02-02T06:28:43","date_gmt":"2026-02-02T06:28:43","guid":{"rendered":"https:\/\/pergolalights.net\/?p=4406"},"modified":"2026-04-03T07:40:32","modified_gmt":"2026-04-03T07:40:32","slug":"luminous-flux-intensity-illuminance-luminance","status":"publish","type":"post","link":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/","title":{"rendered":"\u0421\u0432\u0435\u0442\u043e\u0432\u043e\u0439 \u043f\u043e\u0442\u043e\u043a | \u0418\u043d\u0442\u0435\u043d\u0441\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u0441\u0432\u0435\u0442\u0430 | \u041e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u044c | \u042f\u0440\u043a\u043e\u0441\u0442\u044c | \u041f\u043e\u043d\u044f\u0442\u0438\u044f \u043f\u0440\u043e\u0435\u043a\u0446\u0438\u043e\u043d\u043d\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0441\u043d\u043e\u0433\u043e \u0443\u0433\u043b\u0430 \u043e\u0431\u044a\u044f\u0441\u043d\u0435\u043d\u044b"},"content":{"rendered":"<div class=\"row align-center\"  id=\"row-1475828513\">\n\n\t<div id=\"col-977579012\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div id=\"text-4039482615\" class=\"text\">\n\t\t\n<p>We use the word \u201cbright\u201d every day, but to optical engineers, this phrase could spark a \u201cwar of concepts.\u201d Are you referring to the lamp itself being dazzling, or how clearly it illuminates the tabletop? Behind this lies an entire \u201cmetrology\u201d system precisely describing how light is generated, transmitted, and received. Today, let&#8217;s dissect these core concepts like building blocks: luminous flux, luminous intensity, illuminance, luminance, solid angle, and projected solid angle. Once mastered, you&#8217;ll truly \u201cmaster\u201d light.<\/p>\n\t\t\n<style>\n#text-4039482615 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-4039482615 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_195611455\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1197\" height=\"666\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Fundamental-Concepts-of-Optics.webp\" class=\"attachment-original size-original\" alt=\"Fundamental Concepts of Optics\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Fundamental-Concepts-of-Optics.webp 1197w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Fundamental-Concepts-of-Optics-719x400.webp 719w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Fundamental-Concepts-of-Optics-768x427.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Fundamental-Concepts-of-Optics-18x10.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Fundamental-Concepts-of-Optics-510x284.webp 510w\" sizes=\"auto, (max-width: 1197px) 100vw, 1197px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_195611455 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t<div id=\"gap-2146971741\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-2146971741 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-614285173\">\n\n\t<div id=\"col-1908717491\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"row\"  id=\"row-609372024\">\n\n\t<div id=\"col-1181014497\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n<span class=\"scroll-to\" data-label=\"Scroll to: #First\" data-bullet=\"false\" data-link=\"#First\" data-title=\"First\" ><a name=\"First\"><\/a><\/span>\n\t<div id=\"text-1007532688\" class=\"text\">\n\t\t\n<h2><strong><b>1. <\/b><\/strong><strong>\u041f\u0435\u0440\u0432\u044b\u0439 \u0441\u0442\u0440\u043e\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0431\u043b\u043e\u043a: \u0421\u0432\u0435\u0442\u043e\u0432\u043e\u0439 \u043f\u043e\u0442\u043e\u043a - \u201c\u043f\u043e\u043b\u043d\u044b\u0439 \u043f\u043e\u0442\u043e\u043a\u201d \u0441\u0432\u0435\u0442\u0430<\/strong><\/h2>\n\t\t\n<style>\n#text-1007532688 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-1007532688 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-1007532688 {\n    font-size: 1.1rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-1181014497 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"text-3493171706\" class=\"text\">\n\t\t\n<p>Imagine a water pipe. Luminous flux (\u03a6, measured in lumens lm) is the total volume of water flowing out of the pipe per unit time. It describes the sum of all visible light energy emitted by a light source\u2014a concept of \u201ctotal packaged output.\u201d A 100-watt incandescent bulb produces approximately 1300 lumens\u2014its total \u201clight output.\u201d But total output alone isn&#8217;t enough; light spreads in all directions. This leads us to the second key concept\u2014solid angle.<\/p>\n\t\t\n<style>\n#text-3493171706 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-3493171706 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_211054783\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1197\" height=\"753\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-parameter.webp\" class=\"attachment-original size-original\" alt=\"Luminous flux parameter\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-parameter.webp 1197w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-parameter-636x400.webp 636w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-parameter-768x483.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-parameter-18x12.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-parameter-510x321.webp 510w\" sizes=\"auto, (max-width: 1197px) 100vw, 1197px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_211054783 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t<div id=\"gap-97191185\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-97191185 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-981614314\">\n\n\t<div id=\"col-660483523\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"row\"  id=\"row-666108726\">\n\n\t<div id=\"col-1324481769\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n<span class=\"scroll-to\" data-label=\"Scroll to: #Two\" data-bullet=\"false\" data-link=\"#Two\" data-title=\"Two\" ><a name=\"Two\"><\/a><\/span>\n\t<div id=\"text-3815874812\" class=\"text\">\n\t\t\n<h2><strong><b>2. <\/b><\/strong><strong>\u0412\u0442\u043e\u0440\u043e\u0439 \u0431\u043b\u043e\u043a: \u0422\u0432\u0435\u0440\u0434\u044b\u0439 \u0443\u0433\u043e\u043b - \u201c\u043a\u0443\u0441\u043e\u043a \u043f\u0438\u0446\u0446\u044b\u201d \u0432 \u043a\u043e\u0441\u043c\u043e\u0441\u0435<\/strong><\/h2>\n\t\t\n<style>\n#text-3815874812 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-3815874812 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-3815874812 {\n    font-size: 1.1rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-1324481769 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"text-1736342222\" class=\"text\">\n\t\t\n<p>\u0415\u0441\u043b\u0438 \u043f\u043b\u043e\u0441\u043a\u0438\u0439 \u0443\u0433\u043e\u043b \u043f\u043e\u0445\u043e\u0436 \u043d\u0430 \u043e\u0442\u0440\u0435\u0437\u0430\u043d\u0438\u0435 \u043a\u0443\u0441\u043a\u0430 \u043f\u0438\u0446\u0446\u044b, \u0442\u043e \u0442\u0435\u043b\u0435\u0441\u043d\u044b\u0439 \u0443\u0433\u043e\u043b (\u03a9, \u0438\u0437\u043c\u0435\u0440\u044f\u0435\u0442\u0441\u044f \u0432 \u0441\u0442\u0435\u0440\u0430\u0434\u0438\u0430\u043d\u0430\u0445 sr) \u043f\u043e\u0445\u043e\u0436 \u043d\u0430 \u043e\u0442\u0440\u0435\u0437\u0430\u043d\u0438\u0435 \u201c\u0442\u0440\u0435\u0445\u043c\u0435\u0440\u043d\u043e\u0433\u043e \u043a\u0443\u0441\u043a\u0430 \u043f\u0438\u0446\u0446\u044b\u201d \u043e\u0442 \u0446\u0435\u043d\u0442\u0440\u0430 \u0441\u0444\u0435\u0440\u044b. \u041f\u043e\u043b\u043d\u044b\u0439 \u0448\u0430\u0440 \u0438\u043c\u0435\u0435\u0442 \u0442\u0435\u043b\u0435\u0441\u043d\u044b\u0439 \u0443\u0433\u043e\u043b \u0432 4\u03c0 \u0441\u0442\u0435\u0440\u0430\u0434\u0438\u0430\u043d\u043e\u0432. \u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u044c\u0442\u0435, \u0447\u0442\u043e \u0432\u0430\u0448\u0438 \u0433\u043b\u0430\u0437\u0430 - \u044d\u0442\u043e \u0446\u0435\u043d\u0442\u0440 \u0441\u0444\u0435\u0440\u044b; \u0432\u0441\u0435 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0432\u0438\u0434\u0435\u0442\u044c, \u043e\u0431\u0440\u0430\u0437\u0443\u044e\u0442 \u043f\u043e\u043b\u043d\u043e\u0435 \u201c\u0432\u0438\u0437\u0443\u0430\u043b\u044c\u043d\u043e\u0435 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u043e\u201d. \u041b\u044e\u0431\u0430\u044f \u0447\u0430\u0441\u0442\u0438\u0447\u043d\u0430\u044f \u043e\u0431\u043b\u0430\u0441\u0442\u044c \u0432 \u044d\u0442\u043e\u043c \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 - \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d, \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439 \u0430\u0431\u0430\u0436\u0443\u0440\u043e\u043c, - \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 \u0442\u0435\u043b\u0435\u0441\u043d\u044b\u0439 \u0443\u0433\u043e\u043b \u043c\u0435\u043d\u044c\u0448\u0435 4\u03c0. \u0422\u0435\u043b\u0435\u0441\u043d\u044b\u0435 \u0443\u0433\u043b\u044b \u0438\u0437\u043c\u0435\u0440\u044f\u044e\u0442 \u0441\u0442\u0435\u043f\u0435\u043d\u044c \u0440\u0430\u0441\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0441\u0432\u0435\u0442\u0430 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435.<\/p>\n\t\t\n<style>\n#text-1736342222 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-1736342222 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1836816595\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1197\" height=\"753\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/The-extent-to-which-light-diverges-in-space.webp\" class=\"attachment-original size-original\" alt=\"The extent to which light diverges in space\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/The-extent-to-which-light-diverges-in-space.webp 1197w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/The-extent-to-which-light-diverges-in-space-636x400.webp 636w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/The-extent-to-which-light-diverges-in-space-768x483.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/The-extent-to-which-light-diverges-in-space-18x12.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/The-extent-to-which-light-diverges-in-space-510x321.webp 510w\" sizes=\"auto, (max-width: 1197px) 100vw, 1197px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1836816595 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t<div id=\"gap-1973062562\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1973062562 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-1341651690\">\n\n\t<div id=\"col-2111669636\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"row\"  id=\"row-1841410156\">\n\n\t<div id=\"col-759700586\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n<span class=\"scroll-to\" data-label=\"Scroll to: #Building\" data-bullet=\"false\" data-link=\"#Building\" data-title=\"Building\" ><a name=\"Building\"><\/a><\/span>\n\t<div id=\"text-3703811880\" class=\"text\">\n\t\t\n<h2><strong><b>3. <\/b><\/strong><strong>\u041f\u0435\u0440\u0432\u044b\u0439 \u0431\u043b\u043e\u043a: \u0438\u043d\u0442\u0435\u043d\u0441\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u0441\u0432\u0435\u0442\u0430 - \u201c\u043a\u043e\u043d\u0446\u0435\u043d\u0442\u0440\u0430\u0446\u0438\u044f\u201d \u0441\u0432\u0435\u0442\u0430<\/strong><\/h2>\n\t\t\n<style>\n#text-3703811880 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-3703811880 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-3703811880 {\n    font-size: 1.1rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-759700586 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"text-3596861819\" class=\"text\">\n\t\t\n<p>\u0422\u0435\u043f\u0435\u0440\u044c \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u0438\u043c \u043f\u043e\u043d\u044f\u0442\u0438\u044f \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u0433\u043e \u043f\u043e\u0442\u043e\u043a\u0430 \u0438 \u0442\u0435\u043b\u0435\u0441\u043d\u043e\u0433\u043e \u0443\u0433\u043b\u0430. \u0415\u0441\u043b\u0438 \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u0439 \u043f\u043e\u0442\u043e\u043a \u0441\u0436\u0438\u043c\u0430\u0435\u0442\u0441\u044f \u0438 \u0438\u0437\u043b\u0443\u0447\u0430\u0435\u0442\u0441\u044f \u0432 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u0445 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0441\u043d\u043e\u0433\u043e \u0443\u0433\u043b\u0430, \u0435\u0433\u043e \u201c\u043f\u043b\u043e\u0442\u043d\u043e\u0441\u0442\u044c\u201d \u0443\u0432\u0435\u043b\u0438\u0447\u0438\u0432\u0430\u0435\u0442\u0441\u044f. \u0421\u0438\u043b\u0430 \u0441\u0432\u0435\u0442\u0430 (I, \u0435\u0434\u0438\u043d\u0438\u0446\u0430 \u0438\u0437\u043c\u0435\u0440\u0435\u043d\u0438\u044f: \u043a\u0430\u043d\u0434\u0435\u043b\u0430 \u043a\u0434) - \u044d\u0442\u043e \u0444\u0438\u0437\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0432\u0435\u043b\u0438\u0447\u0438\u043d\u0430, \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u044e\u0449\u0430\u044f \u044d\u0442\u0443 \u0441\u0442\u0435\u043f\u0435\u043d\u044c \u043a\u043e\u043d\u0446\u0435\u043d\u0442\u0440\u0430\u0446\u0438\u0438: I = \u03a6 \/ \u03a9. \u041e\u043d\u0430 \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u043a \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u043c\u0443 \u043f\u043e\u0442\u043e\u043a\u0443, \u0438\u0437\u043b\u0443\u0447\u0430\u0435\u043c\u043e\u043c\u0443 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u0441\u0432\u0435\u0442\u0430 \u0432 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u0445 \u0435\u0434\u0438\u043d\u0438\u0447\u043d\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0441\u043d\u043e\u0433\u043e \u0443\u0433\u043b\u0430 \u0432 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u043c \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0438.<\/p>\n\t\t\n<style>\n#text-3596861819 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-3596861819 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1941321089\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1941321089 {\n  padding-top: 30px;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2333096332\" class=\"text\">\n\t\t\n<p>\u041b\u0430\u0437\u0435\u0440\u043d\u0430\u044f \u0443\u043a\u0430\u0437\u043a\u0430, \u043d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u043d\u0438\u0437\u043a\u0438\u0439 \u043e\u0431\u0449\u0438\u0439 \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u0439 \u043f\u043e\u0442\u043e\u043a (\u03a6), \u0438\u0437\u043b\u0443\u0447\u0430\u0435\u0442 \u0432\u0435\u0441\u044c \u0441\u0432\u0435\u0442 \u0432 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u0445 \u0447\u0440\u0435\u0437\u0432\u044b\u0447\u0430\u0439\u043d\u043e \u043c\u0430\u043b\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0441\u043d\u043e\u0433\u043e \u0443\u0433\u043b\u0430 (\u03a9). \u042d\u0442\u043e \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u0447\u0440\u0435\u0437\u0432\u044b\u0447\u0430\u0439\u043d\u043e \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u0438\u043d\u0442\u0435\u043d\u0441\u0438\u0432\u043d\u043e\u0441\u0442\u0438 \u0441\u0432\u0435\u0442\u0430 (I) \u0432 \u044d\u0442\u043e\u043c \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0438, \u0447\u0442\u043e \u0434\u0435\u043b\u0430\u0435\u0442 \u0435\u0435 \u043e\u0447\u0435\u043d\u044c \u043e\u0441\u043b\u0435\u043f\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439. \u0421\u0432\u0435\u0447\u0430, \u0441 \u0434\u0440\u0443\u0433\u043e\u0439 \u0441\u0442\u043e\u0440\u043e\u043d\u044b, \u0438\u0437\u043b\u0443\u0447\u0430\u0435\u0442 \u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u0439 \u043f\u043e\u0442\u043e\u043a \u0432\u043e \u0432\u0441\u0435\u0445 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f\u0445. \u041e\u0434\u043d\u0430\u043a\u043e \u0438\u0437-\u0437\u0430 \u0431\u043e\u043b\u044c\u0448\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0441\u043d\u043e\u0433\u043e \u0443\u0433\u043b\u0430 \u0435\u0435 \u0441\u0438\u043b\u0430 \u0441\u0432\u0435\u0442\u0430 \u043d\u0435\u0432\u0435\u043b\u0438\u043a\u0430.<\/p>\n\t\t\n<style>\n#text-2333096332 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2333096332 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1407860497\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1197\" height=\"666\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Explanation-of-luminous-intensity.webp\" class=\"attachment-original size-original\" alt=\"Explanation of luminous intensity\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Explanation-of-luminous-intensity.webp 1197w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Explanation-of-luminous-intensity-719x400.webp 719w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Explanation-of-luminous-intensity-768x427.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Explanation-of-luminous-intensity-18x10.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Explanation-of-luminous-intensity-510x284.webp 510w\" sizes=\"auto, (max-width: 1197px) 100vw, 1197px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1407860497 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t<div id=\"gap-839220389\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-839220389 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-1093440579\">\n\n\t<div id=\"col-943479756\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"row\"  id=\"row-501553289\">\n\n\t<div id=\"col-2123908127\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n<span class=\"scroll-to\" data-label=\"Scroll to: #Illuminance\" data-bullet=\"false\" data-link=\"#Illuminance\" data-title=\"Illuminance\" ><a name=\"Illuminance\"><\/a><\/span>\n\t<div id=\"text-2366951639\" class=\"text\">\n\t\t\n<h2><strong><b>4. <\/b><\/strong><strong>\u0422\u0440\u0435\u0442\u0438\u0439 \u0441\u0442\u0440\u043e\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0431\u043b\u043e\u043a: \u041e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u044c - \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0435 \u201c\u0441\u0447\u0430\u0441\u0442\u044c\u0435\u201d<\/strong><\/h2>\n\t\t\n<style>\n#text-2366951639 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-2366951639 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-2366951639 {\n    font-size: 1.1rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-2123908127 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"text-3636307723\" class=\"text\">\n\t\t\n<p>\u041e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u044c (E, \u0438\u0437\u043c\u0435\u0440\u044f\u0435\u0442\u0441\u044f \u0432 \u043b\u044e\u043a\u0441\u0430\u0445 lx) \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u0433\u043e \u043f\u043e\u0442\u043e\u043a\u0430, \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u043c\u043e\u0433\u043e \u043d\u0430 \u0435\u0434\u0438\u043d\u0438\u0446\u0443 \u043f\u043b\u043e\u0449\u0430\u0434\u0438 \u043e\u0441\u0432\u0435\u0449\u0430\u0435\u043c\u043e\u0439 \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438: E = \u03a6 \/ A. \u041e\u043d\u0430 \u043e\u0442\u0432\u0435\u0447\u0430\u0435\u0442 \u043d\u0430 \u0432\u043e\u043f\u0440\u043e\u0441 \u201c\u041d\u0430\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u044f\u0440\u043a\u0430\u044f \u044d\u0442\u0430 \u0441\u0442\u043e\u043b\u0435\u0448\u043d\u0438\u0446\u0430?\u201d \u0432 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u0438 \u043e\u0442 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0430 \u0441\u0432\u0435\u0442\u0430 \u0438 \u0440\u0430\u0441\u0441\u0442\u043e\u044f\u043d\u0438\u044f. \u0412\u043e\u0442 \u043f\u043e\u0447\u0435\u043c\u0443 \u0447\u0442\u0435\u043d\u0438\u0435 \u043f\u0440\u0438 \u0441\u0432\u0435\u0442\u0435 \u0443\u043b\u0438\u0447\u043d\u044b\u0445 \u0444\u043e\u043d\u0430\u0440\u0435\u0439 \u0431\u043e\u043b\u0435\u0435 \u0447\u0435\u0442\u043a\u043e\u0435, \u0447\u0435\u043c \u043f\u0440\u0438 \u0441\u0432\u0435\u0442\u0435 \u043b\u0443\u043d\u044b: \u0445\u043e\u0442\u044f \u043b\u0443\u043d\u0430 (\u043e\u0442\u0440\u0430\u0436\u0430\u044f \u0441\u043e\u043b\u043d\u0435\u0447\u043d\u044b\u0439 \u0441\u0432\u0435\u0442) \u0438\u043c\u0435\u0435\u0442 \u043e\u0433\u0440\u043e\u043c\u043d\u044b\u0439 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u044b\u0439 \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u0439 \u043f\u043e\u0442\u043e\u043a, \u0435\u0435 \u0440\u0430\u0441\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u043d\u0430\u0441\u0442\u043e\u043b\u044c\u043a\u043e \u0432\u0435\u043b\u0438\u043a\u043e, \u0447\u0442\u043e \u201c\u043f\u043b\u043e\u0442\u043d\u043e\u0441\u0442\u044c \u0441\u0432\u0435\u0442\u043e\u0432\u043e\u0433\u043e \u043f\u043e\u0442\u043e\u043a\u0430\u201d (\u0442\u043e \u0435\u0441\u0442\u044c \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u044c), \u0434\u043e\u0441\u0442\u0438\u0433\u0430\u044e\u0449\u0430\u044f \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u044b \u043a\u043d\u0438\u0433\u0438, \u043d\u0438\u0447\u0442\u043e\u0436\u043d\u043e \u043c\u0430\u043b\u0430.<\/p>\n\t\t\n<style>\n#text-3636307723 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-3636307723 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1526911125\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1197\" height=\"750\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Apparent-illuminance.webp\" class=\"attachment-original size-original\" alt=\"Apparent illuminance\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Apparent-illuminance.webp 1197w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Apparent-illuminance-638x400.webp 638w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Apparent-illuminance-768x481.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Apparent-illuminance-18x12.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Apparent-illuminance-510x320.webp 510w\" sizes=\"auto, (max-width: 1197px) 100vw, 1197px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1526911125 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t<div id=\"gap-1221829350\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1221829350 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-1950288762\">\n\n\t<div id=\"col-1753720130\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"row\"  id=\"row-1533261604\">\n\n\t<div id=\"col-1015984941\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n<span class=\"scroll-to\" data-label=\"Scroll to: #Ultimate\" data-bullet=\"false\" data-link=\"#Ultimate\" data-title=\"Ultimate\" ><a name=\"Ultimate\"><\/a><\/span>\n\t<div id=\"text-2277041610\" class=\"text\">\n\t\t\n<h2><strong><b>5. <\/b><\/strong><strong>\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0431\u043b\u043e\u043a: \u042f\u0440\u043a\u043e\u0441\u0442\u044c - \u201c\u044f\u0440\u043a\u043e\u0441\u0442\u044c\u201d \u0441\u0430\u043c\u043e\u0433\u043e \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0430 \u0441\u0432\u0435\u0442\u0430<\/strong><\/h2>\n\t\t\n<style>\n#text-2277041610 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-2277041610 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-2277041610 {\n    font-size: 1.1rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-1015984941 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"text-1968212791\" class=\"text\">\n\t\t\n<p>\u042d\u0442\u043e \u0441\u0430\u043c\u0430\u044f \u043b\u0435\u0433\u043a\u043e\u0443\u0441\u0432\u043e\u044f\u0435\u043c\u0430\u044f \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044f, \u043e\u0434\u043d\u0430\u043a\u043e \u0438\u043c\u0435\u043d\u043d\u043e \u043e\u043d\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438\u0441\u0442\u0438\u043d\u043d\u044b\u043c \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u043c \u201c\u043a\u043e\u0440\u043e\u043b\u044f\u201d.<\/p>\n<p>\u042f\u0440\u043a\u043e\u0441\u0442\u044c (L, \u0438\u0437\u043c\u0435\u0440\u044f\u0435\u0442\u0441\u044f \u0432 \u043d\u0438\u0442\u0430\u0445 \u0438\u043b\u0438 \u043a\u0434\/\u043c\u00b2) \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 \u0432\u043e\u0441\u043f\u0440\u0438\u043d\u0438\u043c\u0430\u0435\u043c\u0443\u044e \u044f\u0440\u043a\u043e\u0441\u0442\u044c \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0430 \u0441\u0432\u0435\u0442\u0430 \u0432 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u043c \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0438, \u043e\u0449\u0443\u0449\u0430\u0435\u043c\u0443\u044e \u0447\u0435\u043b\u043e\u0432\u0435\u0447\u0435\u0441\u043a\u0438\u043c \u0433\u043b\u0430\u0437\u043e\u043c (\u0438\u043b\u0438 \u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u043e\u043c). \u0415\u0433\u043e \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u0441\u0438\u043d\u0442\u0435\u0437\u0438\u0440\u0443\u0435\u0442 \u0432\u0441\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0435 \u043f\u043e\u043d\u044f\u0442\u0438\u044f: L = I \/ (A - cos\u03b8). \u0417\u0434\u0435\u0441\u044c I - \u0441\u0438\u043b\u0430 \u0441\u0432\u0435\u0442\u0430 \u0432 \u0434\u0430\u043d\u043d\u043e\u043c \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0438, A - \u0441\u0432\u0435\u0442\u043e\u0438\u0437\u043b\u0443\u0447\u0430\u044e\u0449\u0430\u044f \u043f\u043b\u043e\u0449\u0430\u0434\u044c \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0430, \u0430 \u03b8 - \u0443\u0433\u043e\u043b \u043c\u0435\u0436\u0434\u0443 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435\u043c \u043d\u0430\u0431\u043b\u044e\u0434\u0435\u043d\u0438\u044f \u0438 \u043d\u043e\u0440\u043c\u0430\u043b\u044c\u044e.<\/p>\n<p>Luminance describes the luminous flux per unit area of the light source surface within a unit solid angle. It is an intrinsic property independent of distance. For example, a streetlight has far greater luminous intensity (I) and total luminous flux (\u03a6) than a smartphone screen, but its surface area (A) is larger, and its light diverges in all directions (large solid angle \u03a9). In contrast, a smartphone screen concentrates its luminous flux over a small area and within a narrow solid angle. Calculations show that the screen&#8217;s luminance (L \u2248 I\/A) can easily exceed 1000 nits\u2014far surpassing the luminance of an old streetlight&#8217;s surface. This is why staring directly at a smartphone screen feels more glaring.<\/p>\n\t\t\n<style>\n#text-1968212791 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-1968212791 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_97353384\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1197\" height=\"753\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-within-the-unit-solid-angle.webp\" class=\"attachment-original size-original\" alt=\"Luminous flux within the unit solid angle\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-within-the-unit-solid-angle.webp 1197w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-within-the-unit-solid-angle-636x400.webp 636w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-within-the-unit-solid-angle-768x483.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-within-the-unit-solid-angle-18x12.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous-flux-within-the-unit-solid-angle-510x321.webp 510w\" sizes=\"auto, (max-width: 1197px) 100vw, 1197px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_97353384 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t<div id=\"gap-1164682246\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1164682246 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-1473128625\">\n\n\t<div id=\"col-1949642606\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"row\"  id=\"row-1604341915\">\n\n\t<div id=\"col-823709076\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n<span class=\"scroll-to\" data-label=\"Scroll to: #Secret\" data-bullet=\"false\" data-link=\"#Secret\" data-title=\"Secret\" ><a name=\"Secret\"><\/a><\/span>\n\t<div id=\"text-2464128469\" class=\"text\">\n\t\t\n<h2><strong><b>6. <\/b><\/strong><strong>\u0421\u0435\u043a\u0440\u0435\u0442\u043d\u044b\u0439 \u043a\u043b\u044e\u0447: \u041f\u0440\u043e\u0435\u0446\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0442\u0432\u0435\u0440\u0434\u044b\u0439 \u0443\u0433\u043e\u043b<\/strong><\/h2>\n\t\t\n<style>\n#text-2464128469 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-2464128469 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-2464128469 {\n    font-size: 1.1rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-823709076 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"text-432576594\" class=\"text\">\n\t\t\n<p>\u0412 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0438 \u044f\u0440\u043a\u043e\u0441\u0442\u0438 \u043f\u043b\u043e\u0449\u0430\u0434\u044c \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442\u0441\u044f A - cos\u03b8, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u044f \u0441\u043e\u0431\u043e\u0439 \u043f\u0440\u043e\u0435\u0446\u0438\u0440\u0443\u0435\u043c\u0443\u044e \u043f\u043b\u043e\u0449\u0430\u0434\u044c. \u041f\u043e\u0447\u0435\u043c\u0443 \u043f\u0440\u043e\u0435\u0446\u0438\u0440\u0443\u0435\u043c\u0430\u044f? \u041f\u043e\u0442\u043e\u043c\u0443 \u0447\u0442\u043e \u043f\u0440\u0438 \u043d\u0430\u043a\u043b\u043e\u043d\u0435 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0431\u0437\u043e\u0440\u0430 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u0430\u044f \u043f\u043b\u043e\u0449\u0430\u0434\u044c \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u0432\u044b \u0432\u043e\u0441\u043f\u0440\u0438\u043d\u0438\u043c\u0430\u0435\u0442\u0435, \u0443\u043c\u0435\u043d\u044c\u0448\u0430\u0435\u0442\u0441\u044f. \u042d\u0442\u043e \u0435\u0441\u0442\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u0432\u0432\u043e\u0434\u0438\u0442 \u043f\u043e\u043d\u044f\u0442\u0438\u0435 \u043f\u0440\u043e\u0435\u0446\u0438\u0440\u0443\u0435\u043c\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0441\u043d\u043e\u0433\u043e \u0443\u0433\u043b\u0430.<\/p>\n<p>\u041f\u0440\u0438 \u0440\u0430\u0441\u0447\u0435\u0442\u0435 \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u043d\u0430 \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0439 \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438 \u0442\u0435\u043b\u0435\u0441\u043d\u044b\u0439 \u0443\u0433\u043e\u043b \u043c\u0435\u0436\u0434\u0443 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u0441\u0432\u0435\u0442\u0430 \u0438 \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u044c\u044e \u0442\u0430\u043a\u0436\u0435 \u0434\u043e\u043b\u0436\u0435\u043d \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u0442\u044c \u044d\u0442\u043e\u0442 \u0444\u0430\u043a\u0442\u043e\u0440 \u043d\u0430\u043a\u043b\u043e\u043d\u0430 - \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0442\u0435\u043b\u0435\u0441\u043d\u044b\u0439 \u0443\u0433\u043e\u043b. \u041e\u043d \u0443\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442 \u0440\u0430\u0437\u0440\u044b\u0432 \u043c\u0435\u0436\u0434\u0443 \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u044c\u044e \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0430 \u0441\u0432\u0435\u0442\u0430 \u0438 \u043e\u0441\u0432\u0435\u0449\u0435\u043d\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438, \u0441\u043b\u0443\u0436\u0430 \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u043c \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u043c \u0434\u043b\u044f \u0431\u043e\u043b\u0435\u0435 \u0442\u043e\u0447\u043d\u044b\u0445 \u0440\u0430\u0441\u0447\u0435\u0442\u043e\u0432 \u0432 \u0442\u0440\u0430\u0441\u0441\u0438\u0440\u043e\u0432\u043a\u0435 \u043b\u0443\u0447\u0435\u0439 \u0438 \u0440\u0430\u0434\u0438\u043e\u043c\u0435\u0442\u0440\u0438\u0438.<\/p>\n\t\t\n<style>\n#text-432576594 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-432576594 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":4416,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[84],"tags":[],"class_list":["post-4406","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Confused by &quot;brightness&quot;? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Andy\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"ru_RU\" \/>\n\t\t<meta property=\"og:site_name\" content=\"pergolalights.net - VLEDSTAR | Leading Pergola Lighting &amp; Control System Factory\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Luminous Flux vs. Intensity vs. Luminance: A Guide\" \/>\n\t\t<meta property=\"og:description\" content=\"Confused by &quot;brightness&quot;? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-02-02T06:28:43+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-04-03T07:40:32+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61574619470591\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Luminous Flux vs. Intensity vs. Luminance: A Guide\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Confused by &quot;brightness&quot;? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#blogposting\",\"name\":\"Luminous Flux vs. Intensity vs. Luminance: A Guide\",\"headline\":\"Luminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained\",\"author\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/author\\\/market-gaofoxmail-com\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/pergolalights.net\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide.webp\",\"width\":545,\"height\":305,\"caption\":\"Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide\"},\"datePublished\":\"2026-02-02T06:28:43+00:00\",\"dateModified\":\"2026-04-03T07:40:32+00:00\",\"inLanguage\":\"ru-RU\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#webpage\"},\"articleSection\":\"Technical\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/pergolalights.net\\\/ru\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/category\\\/technical\\\/#listItem\",\"name\":\"Technical\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/category\\\/technical\\\/#listItem\",\"position\":2,\"name\":\"Technical\",\"item\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/category\\\/technical\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#listItem\",\"name\":\"Luminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#listItem\",\"position\":3,\"name\":\"Luminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/category\\\/technical\\\/#listItem\",\"name\":\"Technical\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/#organization\",\"name\":\"VLEDSTAR\",\"description\":\"VLEDSTAR is a leading China-based manufacturer specializing in the R&amp;D and production of integrated pergola lighting and smart control systems. With over 16 years of experience, we provide professional LED spotlights, strip lights, and RF control solutions for pergola manufacturers and outdoor living brands worldwide.\",\"url\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/\",\"email\":\"info@pergolalights.net\",\"telephone\":\"+8613430989919\",\"foundingDate\":\"2010-11-02\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"value\":50},\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/pergolalights.net\\\/wp-content\\\/uploads\\\/2025\\\/02\\\/BLACK-LOGO.png\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#organizationLogo\",\"width\":1600,\"height\":1600,\"caption\":\"VLED BLACK LOGO\"},\"image\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#organizationLogo\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61574619470591\",\"https:\\\/\\\/www.tiktok.com\\\/@vledcorp5?\",\"https:\\\/\\\/www.youtube.com\\\/@Vledcorp\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/author\\\/market-gaofoxmail-com\\\/#author\",\"url\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/author\\\/market-gaofoxmail-com\\\/\",\"name\":\"Andy\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#authorImage\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/001ae49cf270ae414cdc27e9b277b7ea70a1a40b1155001eb718b712195ddf8e?s=96&d=mm&r=g\",\"width\":96,\"height\":96,\"caption\":\"Andy\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#webpage\",\"url\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/\",\"name\":\"Luminous Flux vs. Intensity vs. Luminance: A Guide\",\"description\":\"Confused by \\\"brightness\\\"? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.\",\"inLanguage\":\"ru-RU\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#breadcrumblist\"},\"author\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/author\\\/market-gaofoxmail-com\\\/#author\"},\"creator\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/author\\\/market-gaofoxmail-com\\\/#author\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/pergolalights.net\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide.webp\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#mainImage\",\"width\":545,\"height\":305,\"caption\":\"Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/luminous-flux-intensity-illuminance-luminance\\\/#mainImage\"},\"datePublished\":\"2026-02-02T06:28:43+00:00\",\"dateModified\":\"2026-04-03T07:40:32+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/#website\",\"url\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/\",\"name\":\"Pergola Lights\",\"alternateName\":\"PergolaLights.net\",\"description\":\"VLEDSTAR | Leading Pergola Lighting & Control System Factory\",\"inLanguage\":\"ru-RU\",\"publisher\":{\"@id\":\"https:\\\/\\\/pergolalights.net\\\/ru\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<script type=\"text\/javascript\">\n\t\t\t(function(c,l,a,r,i,t,y){\n\t\t\tc[a]=c[a]||function(){(c[a].q=c[a].q||[]).push(arguments)};t=l.createElement(r);t.async=1;\n\t\t\tt.src=\"https:\/\/www.clarity.ms\/tag\/\"+i+\"?ref=aioseo\";y=l.getElementsByTagName(r)[0];y.parentNode.insertBefore(t,y);\n\t\t})(window, document, \"clarity\", \"script\", \"w13qem0ua7\");\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Luminous Flux vs. Intensity vs. Luminance: A Guide","description":"Confused by \"brightness\"? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.","canonical_url":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BlogPosting","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#blogposting","name":"Luminous Flux vs. Intensity vs. Luminance: A Guide","headline":"Luminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained","author":{"@id":"https:\/\/pergolalights.net\/ru\/author\/market-gaofoxmail-com\/#author"},"publisher":{"@id":"https:\/\/pergolalights.net\/ru\/#organization"},"image":{"@type":"ImageObject","url":"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide.webp","width":545,"height":305,"caption":"Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide"},"datePublished":"2026-02-02T06:28:43+00:00","dateModified":"2026-04-03T07:40:32+00:00","inLanguage":"ru-RU","mainEntityOfPage":{"@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#webpage"},"isPartOf":{"@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#webpage"},"articleSection":"Technical"},{"@type":"BreadcrumbList","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/pergolalights.net\/ru#listItem","position":1,"name":"Home","item":"https:\/\/pergolalights.net\/ru","nextItem":{"@type":"ListItem","@id":"https:\/\/pergolalights.net\/ru\/category\/technical\/#listItem","name":"Technical"}},{"@type":"ListItem","@id":"https:\/\/pergolalights.net\/ru\/category\/technical\/#listItem","position":2,"name":"Technical","item":"https:\/\/pergolalights.net\/ru\/category\/technical\/","nextItem":{"@type":"ListItem","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#listItem","name":"Luminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained"},"previousItem":{"@type":"ListItem","@id":"https:\/\/pergolalights.net\/ru#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#listItem","position":3,"name":"Luminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained","previousItem":{"@type":"ListItem","@id":"https:\/\/pergolalights.net\/ru\/category\/technical\/#listItem","name":"Technical"}}]},{"@type":"Organization","@id":"https:\/\/pergolalights.net\/ru\/#organization","name":"VLEDSTAR","description":"VLEDSTAR is a leading China-based manufacturer specializing in the R&amp;D and production of integrated pergola lighting and smart control systems. With over 16 years of experience, we provide professional LED spotlights, strip lights, and RF control solutions for pergola manufacturers and outdoor living brands worldwide.","url":"https:\/\/pergolalights.net\/ru\/","email":"info@pergolalights.net","telephone":"+8613430989919","foundingDate":"2010-11-02","numberOfEmployees":{"@type":"QuantitativeValue","value":50},"logo":{"@type":"ImageObject","url":"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/02\/BLACK-LOGO.png","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#organizationLogo","width":1600,"height":1600,"caption":"VLED BLACK LOGO"},"image":{"@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#organizationLogo"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61574619470591","https:\/\/www.tiktok.com\/@vledcorp5?","https:\/\/www.youtube.com\/@Vledcorp"]},{"@type":"Person","@id":"https:\/\/pergolalights.net\/ru\/author\/market-gaofoxmail-com\/#author","url":"https:\/\/pergolalights.net\/ru\/author\/market-gaofoxmail-com\/","name":"Andy","image":{"@type":"ImageObject","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#authorImage","url":"https:\/\/secure.gravatar.com\/avatar\/001ae49cf270ae414cdc27e9b277b7ea70a1a40b1155001eb718b712195ddf8e?s=96&d=mm&r=g","width":96,"height":96,"caption":"Andy"}},{"@type":"WebPage","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#webpage","url":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/","name":"Luminous Flux vs. Intensity vs. Luminance: A Guide","description":"Confused by \"brightness\"? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.","inLanguage":"ru-RU","isPartOf":{"@id":"https:\/\/pergolalights.net\/ru\/#website"},"breadcrumb":{"@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#breadcrumblist"},"author":{"@id":"https:\/\/pergolalights.net\/ru\/author\/market-gaofoxmail-com\/#author"},"creator":{"@id":"https:\/\/pergolalights.net\/ru\/author\/market-gaofoxmail-com\/#author"},"image":{"@type":"ImageObject","url":"https:\/\/pergolalights.net\/wp-content\/uploads\/2026\/02\/Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide.webp","@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#mainImage","width":545,"height":305,"caption":"Luminous_Flux_vs._Intensity_vs._Luminance_A_Guide"},"primaryImageOfPage":{"@id":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/#mainImage"},"datePublished":"2026-02-02T06:28:43+00:00","dateModified":"2026-04-03T07:40:32+00:00"},{"@type":"WebSite","@id":"https:\/\/pergolalights.net\/ru\/#website","url":"https:\/\/pergolalights.net\/ru\/","name":"Pergola Lights","alternateName":"PergolaLights.net","description":"VLEDSTAR | Leading Pergola Lighting & Control System Factory","inLanguage":"ru-RU","publisher":{"@id":"https:\/\/pergolalights.net\/ru\/#organization"}}]},"og:locale":"ru_RU","og:site_name":"pergolalights.net - VLEDSTAR | Leading Pergola Lighting &amp; Control System Factory","og:type":"article","og:title":"Luminous Flux vs. Intensity vs. Luminance: A Guide","og:description":"Confused by &quot;brightness&quot;? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.","og:url":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/","article:published_time":"2026-02-02T06:28:43+00:00","article:modified_time":"2026-04-03T07:40:32+00:00","article:publisher":"https:\/\/www.facebook.com\/profile.php?id=61574619470591","twitter:card":"summary_large_image","twitter:title":"Luminous Flux vs. Intensity vs. Luminance: A Guide","twitter:description":"Confused by &quot;brightness&quot;? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies."},"aioseo_meta_data":{"post_id":"4406","title":"Luminous Flux vs. Intensity vs. Luminance: A Guide","description":"Confused by \"brightness\"? We break down the core building blocks of light: Luminous Flux, Intensity, Illuminance, and Solid Angle with simple analogies.","keywords":null,"keyphrases":{"focus":{"keyphrase":"","score":0,"analysis":{"keyphraseInTitle":{"score":0,"maxScore":9,"error":1}}},"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":"","og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"BlogPosting","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","local_seo":null,"breadcrumb_settings":null,"limit_modified_date":false,"ai":{"faqs":[],"keyPoints":[],"titles":[],"descriptions":[],"socialPosts":{"email":[],"linkedin":[],"twitter":[],"facebook":[],"instagram":[]}},"created":"2026-02-02 06:28:43","updated":"2026-04-03 07:44:51","seo_analyzer_scan_date":null,"focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/pergolalights.net\/ru\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/pergolalights.net\/ru\/category\/technical\/\" title=\"Technical\">Technical<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tLuminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/pergolalights.net\/ru"},{"label":"Technical","link":"https:\/\/pergolalights.net\/ru\/category\/technical\/"},{"label":"Luminous Flux | Luminous Intensity | Illuminance | Luminance | Projected Solid Angle Concepts Explained","link":"https:\/\/pergolalights.net\/ru\/luminous-flux-intensity-illuminance-luminance\/"}],"_links":{"self":[{"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/posts\/4406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/comments?post=4406"}],"version-history":[{"count":4,"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/posts\/4406\/revisions"}],"predecessor-version":[{"id":5148,"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/posts\/4406\/revisions\/5148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/media\/4416"}],"wp:attachment":[{"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/media?parent=4406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/categories?post=4406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pergolalights.net\/ru\/wp-json\/wp\/v2\/tags?post=4406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}