{"id":3237,"date":"2025-09-03T06:35:07","date_gmt":"2025-09-03T06:35:07","guid":{"rendered":"https:\/\/pergolalights.net\/?p=3237"},"modified":"2026-04-03T08:23:07","modified_gmt":"2026-04-03T08:23:07","slug":"what-are-lumens-lux-nits-and-candela","status":"publish","type":"post","link":"https:\/\/pergolalights.net\/tr\/what-are-lumens-lux-nits-and-candela\/","title":{"rendered":"L\u00fcmen, l\u00fcks, nit ve kandela nedir?"},"content":{"rendered":"<div class=\"row align-center\"  id=\"row-951280294\">\n\n\t<div id=\"col-87451588\" 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-355525563\">\n\n\t<div id=\"col-881636383\" 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\t<div id=\"text-4226788616\" class=\"text\">\n\t\t\n<h2><strong><b>1. <\/b><\/strong><strong>\u00d6ns\u00f6z<\/strong><\/h2>\n\t\t\n<style>\n#text-4226788616 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-4226788616 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-4226788616 {\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-881636383 > .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-992957076\" class=\"text\">\n\t\t\n<p>Evlerimizdeki lambalardan cep telefonlar\u0131m\u0131zdaki ekranlara, d\u0131\u015far\u0131daki g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131ndan geceleri yanan neon \u0131\u015f\u0131klar\u0131na kadar \u0131\u015f\u0131k g\u00fcnl\u00fck hayat\u0131m\u0131zda her zaman var. Say\u0131s\u0131z formda bizi \u00e7evrelemektedir. I\u015f\u0131\u011f\u0131n \u00f6zelliklerini tan\u0131mlamak i\u00e7in, l\u00fcmen, l\u00fcks, nit ve kandela en \u00f6nemli d\u00f6rt tanesi olmak \u00fczere baz\u0131 \u00f6zel fiziksel birimler vazge\u00e7ilmezdir. G\u00f6r\u00fcn\u00fc\u015fte soyut olsa da, bu birimler \u0131\u015f\u0131k alg\u0131m\u0131z ve pratik uygulamalar\u0131 ile i\u00e7sel olarak ba\u011flant\u0131l\u0131d\u0131r. Uygun parlakl\u0131ktaki ampullerin se\u00e7iminden ekranlar i\u00e7in g\u00f6r\u00fcnt\u00fc efektlerinin tasarlanmas\u0131na ve hatta foto\u011fraf\u00e7\u0131l\u0131k ve ayd\u0131nlatma m\u00fchendisli\u011fi gibi uzmanl\u0131k alanlar\u0131nda bile bu birimler vazge\u00e7ilmez bir rol oynamaktad\u0131r.<\/p>\n<p>Ancak bir\u00e7ok ki\u015fi bu d\u00f6rt kavram\u0131 kafa kar\u0131\u015ft\u0131r\u0131c\u0131 bulmakta, anlamlar\u0131n\u0131 ve uygulamalar\u0131n\u0131 net bir \u015fekilde ay\u0131rt etmekte zorlanmaktad\u0131r. Bu nedenle, bu d\u00f6rt birimin kavramlar\u0131n\u0131 netle\u015ftirmek ve tan\u0131mlad\u0131klar\u0131 optik \u00f6zellikleri tan\u0131mlamak, \u0131\u015f\u0131\u011f\u0131 daha iyi anlamam\u0131z ve kullanmam\u0131z i\u00e7in b\u00fcy\u00fck \u00f6nem ta\u015f\u0131maktad\u0131r.<\/p>\n\t\t\n<style>\n#text-992957076 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-992957076 {\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_913596983\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" style=\"margin:0px 0px 20px 0px;\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1208\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela.webp\" class=\"attachment-original size-original\" alt=\"Lumen,_lux,_nit,_candela\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela.webp 2000w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela-510x308.webp 510w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela-662x400.webp 662w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela-1325x800.webp 1325w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela-768x464.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela-1536x928.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Lumen_lux_nit_candela-18x12.webp 18w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/>\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_913596983 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1941765953\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1941765953 {\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-1810613516\">\n\n\t<div id=\"col-805021108\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n\t<div id=\"text-574966161\" class=\"text\">\n\t\t\n<h2><strong><b>2. <\/b><\/strong><strong>K\u0131sa Konsept<\/strong><\/h2>\n\t\t\n<style>\n#text-574966161 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-574966161 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-574966161 {\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-805021108 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-1687770114\">\n\n\t<div id=\"col-511444438\" 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-3639164119\" class=\"text\">\n\t\t\n<p>1. L\u00fcmen, watt'a benzer \u015fekilde \u0131\u015f\u0131k i\u00e7in bir \u00f6l\u00e7\u00fc birimidir, ancak \u00f6l\u00e7\u00fcm\u00fc insan g\u00f6z\u00fcn\u00fcn hassasiyetini dikkate al\u0131r. Bir \u0131\u015f\u0131k kayna\u011f\u0131n\u0131n \u00f6zellikleri incelenirken, l\u00fcmenler \u0131\u015f\u0131\u011f\u0131n yay\u0131ld\u0131\u011f\u0131 y\u00f6nden ba\u011f\u0131ms\u0131z olarak \u0131\u015f\u0131k kayna\u011f\u0131n\u0131n toplam \u00e7\u0131k\u0131\u015f\u0131n\u0131 \u00f6l\u00e7er.<\/p>\n<p>2. Lux, metrekare ba\u015f\u0131na al\u0131nan l\u00fcmen say\u0131s\u0131n\u0131 ifade eder. G\u00fcnl\u00fck dilde buna \u2018ayd\u0131nl\u0131k\u2019 diyebiliriz, ancak optik mesle\u011finde \u2018ayd\u0131nl\u0131k\u2019 olarak adland\u0131r\u0131l\u0131r. Belirli bir y\u00fczeye d\u00fc\u015fen \u0131\u015f\u0131k miktar\u0131n\u0131 g\u00f6sterir.<\/p>\n<p>3. Nit, steradyan ba\u015f\u0131na metre kare ba\u015f\u0131na d\u00fc\u015fen l\u00fcmen say\u0131s\u0131d\u0131r ve g\u00fcnl\u00fck terimlerle \u2018parlakl\u0131k\u2019 olarak adland\u0131r\u0131labilir, ancak end\u00fcstride \u2018parlakl\u0131k\u2019 olarak adland\u0131r\u0131l\u0131r. \u0130deal bir da\u011f\u0131n\u0131k yans\u0131t\u0131c\u0131 y\u00fczeye 1 lux'l\u00fck bir ayd\u0131nl\u0131k d\u00fc\u015ferse, bu 1 nit'lik bir parlakl\u0131k \u00fcretir.<\/p>\n<p>4. Kandela, steradyan ba\u015f\u0131na l\u00fcmen say\u0131s\u0131d\u0131r. Noktasal \u0131\u015f\u0131k kaynaklar\u0131 i\u00e7in kullan\u0131l\u0131r ve konumu ne olursa olsun ayd\u0131nlat\u0131lan herhangi bir y\u00fczey taraf\u0131ndan al\u0131nan \u0131\u015f\u0131k miktar\u0131n\u0131n hesaplanmas\u0131n\u0131 sa\u011flar.<\/p>\n\t\t\n<style>\n#text-3639164119 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-3639164119 {\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_509372968\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" style=\"margin:0px 0px 20px 0px;\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1186\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-scaled.webp\" class=\"attachment-original size-original\" alt=\"LUMENS_&amp;_CANDELAS\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-scaled.webp 2560w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-scaled-510x236.webp 510w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-800x371.webp 800w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-1400x648.webp 1400w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-768x356.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-1536x711.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-2048x948.webp 2048w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/LUMENS__CANDELAS-18x8.webp 18w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/>\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_509372968 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-1901670468\" class=\"text\">\n\t\t\n<p>Ba\u015fka bir deyi\u015fle kandela, \u0131\u015f\u0131k kayna\u011f\u0131n\u0131 merkez alan hayali bir k\u00fcre boyunca \u0131\u015f\u0131k yo\u011funlu\u011funu \u00f6l\u00e7er. \u0130zotropik bir nokta kaynak i\u00e7in, bir kandela steradyan ba\u015f\u0131na bir l\u00fcmene e\u015fittir. I\u015f\u0131k kayna\u011f\u0131n\u0131 \u00e7evreleyen tam bir k\u00fcre 4\u03c0 (yakla\u015f\u0131k 12,6) steradyan\u0131 kapsar. Sonu\u00e7 olarak, 12,6 l\u00fcmen yayan izotropik bir \u0131\u015f\u0131k kayna\u011f\u0131 1 kandela \u0131\u015f\u0131k yo\u011funlu\u011fu \u00fcretir. Bu, tipik lazerler i\u00e7in tamamen ge\u00e7erli de\u011fildir, ancak k\u0131sa arkl\u0131 ksenon lambalar gibi \u0131\u015f\u0131k kaynaklar\u0131 i\u00e7in makul bir yakla\u015f\u0131m olu\u015fturur. Bununla birlikte, kandela yine de \u0131raksak bir \u0131\u015f\u0131n\u0131n bir k\u0131sm\u0131 i\u00e7in tan\u0131mlanabilir. \u00d6rne\u011fin, lazeriniz yaln\u0131zca 0,1 steradyanl\u0131k bir aral\u0131kta 1 l\u00fcmen yay\u0131yorsa, \u0131\u015f\u0131k yo\u011funlu\u011fu 10 kandela olacakt\u0131r.<\/p>\n\t\t\n<style>\n#text-1901670468 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-1901670468 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-706606814\" class=\"text\">\n\t\t\n<p>Ayak mili bir ayd\u0131nl\u0131k birimidir. Kuzey Amerika Ayd\u0131nlatma M\u00fchendisli\u011fi Toplulu\u011fu bunu ANSI\/IES RP-16-1996, Ayd\u0131nlatma M\u00fchendisli\u011fi Terminolojisi'nde \u2018bir y\u00fczey \u00fczerindeki bir noktaya gelen \u0131\u015f\u0131k ak\u0131s\u0131n\u0131n y\u00fczey yo\u011funlu\u011fu\u2019 olarak tan\u0131mlamaktad\u0131r.<\/p>\n\t\t\n<style>\n#text-706606814 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-706606814 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-3657280992\" class=\"text\">\n\t\t\n<p>In layman&#8217;s terms, illuminance is the amount of light reaching a point on a real or imaginary surface. (This point need not be located on a physical surface.)<\/p>\n\t\t\n<style>\n#text-3657280992 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-3657280992 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-391529205\" class=\"text\">\n\t\t\n<p>Bir foot-candle, foot kare ba\u015f\u0131na bir l\u00fcmene e\u015fittir (burada l\u00fcmen, \u0131\u015f\u0131k ak\u0131s\u0131 veya \u0131\u015f\u0131k miktar\u0131 i\u00e7in \u00f6l\u00e7\u00fc birimidir).<\/p>\n\t\t\n<style>\n#text-391529205 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-391529205 {\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_1767398242\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" style=\"margin:0px 0px 20px 0px;\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1120\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources.webp\" class=\"attachment-original size-original\" alt=\"conforming_to_the_inverse_square_law_for_point_light_sources\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources.webp 2000w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources-510x286.webp 510w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources-714x400.webp 714w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources-1400x784.webp 1400w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources-768x430.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources-1536x860.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/conforming_to_the_inverse_square_law_for_point_light_sources-18x10.webp 18w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/>\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_1767398242 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2265116874\" class=\"text\">\n\t\t\n<p>The luminous intensity of a candle flame (or equivalently, its candela) is approximately 1 candela. If you place the candle one foot away from a surface, the illuminance on that surface at this distance will be approximately one\u00a0foot-candle due to the candle&#8217;s illumination. At 2 feet, the illuminance would be 1\/4 foot-candle; at 3 feet, it would be 1\/9 foot-candle, and so on, conforming to the inverse square law for point light sources.<\/p>\n\t\t\n<style>\n#text-2265116874 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2265116874 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2608033166\" class=\"text\">\n\t\t\n<p>Parlakl\u0131k, do\u011frudan \u00f6l\u00e7\u00fclemeyen psikofiziksel bir olgudur. \u201cFotometrik parlakl\u0131k\u201d terimi bir zamanlar parlakl\u0131\u011f\u0131 ifade etmek i\u00e7in kullan\u0131lm\u0131\u015ft\u0131r, ancak art\u0131k bilimsel veya m\u00fchendislik ba\u011flamlar\u0131nda kullan\u0131lmamaktad\u0131r.<\/p>\n\t\t\n<style>\n#text-2608033166 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2608033166 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1560675339\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1560675339 {\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-2082263594\">\n\n\t<div id=\"col-586612379\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n\t<div id=\"text-46915370\" class=\"text\">\n\t\t\n<h2><strong><b>3. <\/b><\/strong><strong>Spesifik tan\u0131m<\/strong><\/h2>\n\t\t\n<style>\n#text-46915370 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-46915370 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-46915370 {\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-586612379 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n\t<div id=\"col-367320936\" 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-1680508222\" class=\"text\">\n\t\t\n<p><strong><b>L\u00fcmenin tan\u0131m\u0131<\/b><\/strong>: 1\/683 watt g\u00fcc\u00fcnde 540 terahertz frekans\u0131nda (veya yakla\u015f\u0131k 555,5 nanometre dalga boyunda) monokromatik \u0131\u015f\u0131\u011f\u0131n \u0131\u015f\u0131k ak\u0131s\u0131. L\u00fcmenin kandelaya dayal\u0131 t\u00fcretilmi\u015f bir birim oldu\u011funu (1 kandela steradyan ba\u015f\u0131na 1 l\u00fcmene e\u015fittir), kandelan\u0131n ise temel bir birim oldu\u011funu (540 terahertz frekans\u0131ndaki monokromatik \u0131\u015f\u0131k i\u00e7in steradyan ba\u015f\u0131na 1\/683 watt'l\u0131k \u2018\u0131\u015f\u0131n kandela g\u00fcc\u00fcn\u00fc\u2019 temsil eder) belirtmek gerekir. Dalga boyu 555,5 nanometreden farkl\u0131 olan \u0131\u015f\u0131k i\u00e7in, yay\u0131lan enerjinin watt'\u0131 ba\u015f\u0131na l\u00fcmen say\u0131s\u0131 farkl\u0131d\u0131r. 555,5 nanometre d\u0131\u015f\u0131ndaki dalga boylar\u0131 i\u00e7in watt ba\u015f\u0131na l\u00fcmen, 683'\u00fcn o dalga boyu i\u00e7in fotopik \u0131\u015f\u0131k verimlili\u011fi fonksiyonu de\u011feri ile \u00e7arp\u0131l\u0131p 555,5 nanometredeki fotopik \u0131\u015f\u0131k verimlili\u011fi fonksiyonu de\u011ferine b\u00f6l\u00fcnmesine kar\u015f\u0131l\u0131k gelir (bu de\u011ferin 1'e \u00e7ok yak\u0131n oldu\u011funa inan\u0131yorum, ancak tam olarak 1 de\u011fil).<\/p>\n\t\t\n<style>\n#text-1680508222 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-1680508222 {\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_1445492710\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" style=\"margin:-60px 0px -40px 0px;\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/assets_task_01k47ay5kve6ra2x5dctv9m6xd_1756888038_img_1.webp\" class=\"attachment-original size-original\" alt=\"lumen and candela\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/assets_task_01k47ay5kve6ra2x5dctv9m6xd_1756888038_img_1.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/assets_task_01k47ay5kve6ra2x5dctv9m6xd_1756888038_img_1-510x340.webp 510w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/assets_task_01k47ay5kve6ra2x5dctv9m6xd_1756888038_img_1-600x400.webp 600w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/assets_task_01k47ay5kve6ra2x5dctv9m6xd_1756888038_img_1-1200x800.webp 1200w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/assets_task_01k47ay5kve6ra2x5dctv9m6xd_1756888038_img_1-768x512.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/assets_task_01k47ay5kve6ra2x5dctv9m6xd_1756888038_img_1-18x12.webp 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/>\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_1445492710 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-211223950\" class=\"text\">\n\t\t\n<p><strong><b>L\u00fcmenler<\/b><\/strong>\u00a0Watt ba\u015f\u0131na elektrik enerjisini \u0131\u015f\u0131k enerjisine d\u00f6n\u00fc\u015ft\u00fcrmede verimlili\u011fin bir g\u00f6stergesi olarak hizmet eder. Bu de\u011ferin bir LED taraf\u0131ndan t\u00fcketilen watt ile \u00e7arp\u0131lmas\u0131 \u0131\u015f\u0131k ak\u0131s\u0131n\u0131 (l\u00fcmen cinsinden) verir. Tipik k\u0131rm\u0131z\u0131, turuncu, sar\u0131 veya sar\u0131-ye\u015fil LED'ler yakla\u015f\u0131k 2 voltluk bir voltaj d\u00fc\u015f\u00fc\u015f\u00fc sergiler ve 20 miliamperlik standart bir ak\u0131mda yakla\u015f\u0131k 0,04 watt t\u00fcketir. Buna kar\u015f\u0131l\u0131k, mavi, beyaz veya sar\u0131ms\u0131 olmayan ye\u015fil LED'ler tipik olarak 20 miliamperde 3,5 voltluk bir voltaj d\u00fc\u015f\u00fc\u015f\u00fcne sahiptir ve bu da 0,07 watt'l\u0131k bir g\u00fc\u00e7 t\u00fcketimine neden olur.<\/p>\n\t\t\n<style>\n#text-211223950 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-211223950 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-367320936 > .col-inner {\n  margin: 0px 0px -25px 0px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-137063290\">\n\n\t<div id=\"col-268116270\" 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-2598515903\" class=\"text\">\n\t\t\n<p>Kandela, steradyan ba\u015f\u0131na l\u00fcmen say\u0131s\u0131d\u0131r ve \u2018\u0131\u015f\u0131k-mum g\u00fcc\u00fc\u2019 olarak da bilinir. (Pratikte, daha \u00f6nce de belirtildi\u011fi gibi, kandela temel metrik birimdir, l\u00fcmen ise kandela cinsinden tan\u0131mlan\u0131r). Sonu\u00e7 olarak l\u00fcmen, kandela ile \u0131\u015f\u0131n\u0131n kaplad\u0131\u011f\u0131 kat\u0131 a\u00e7\u0131n\u0131n \u00e7arp\u0131m\u0131na e\u015fittir. \u0130deal olarak, kandela l\u00fcmenin \u0131\u015f\u0131n\u0131n kaplad\u0131\u011f\u0131 kat\u0131 a\u00e7\u0131ya b\u00f6l\u00fcnmesine e\u015fittir - t\u00fcm \u0131\u015f\u0131\u011f\u0131n \u0131\u015f\u0131n i\u00e7inde bulundu\u011fu ve \u0131\u015f\u0131n i\u00e7indeki \u2018kandela g\u00fcc\u00fcn\u00fcn\u2019 sabit oldu\u011fu varsay\u0131l\u0131r.<\/p>\n\t\t\n<style>\n#text-2598515903 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2598515903 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-4142162698\" class=\"text\">\n\t\t\n<p>You might well ask, what is sphericity? Sphericity is 1\/(4\u03c0) of the entire sphere, or 1\/(2\u03c0) of a hemisphere, equating to approximately 3283 \u2018square degrees\u2019. The formula for calculating sphericity based on beam angle is as follows: Sphericity = 2 \u00d7 \u03c0 \u00d7 (1 &#8211; cos(0.5 \u00d7 beam angle))<\/p>\n\t\t\n<style>\n#text-4142162698 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-4142162698 {\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_2085663518\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" style=\"margin:0px 0px 20px 0px;\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"991\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle.webp\" class=\"attachment-original size-original\" alt=\"formula_for_calculating_sphericity_based_on_beam_angle\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle.webp 2000w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle-510x253.webp 510w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle-800x396.webp 800w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle-1400x694.webp 1400w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle-768x381.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle-1536x761.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/formula_for_calculating_sphericity_based_on_beam_angle-18x9.webp 18w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/>\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_2085663518 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-1592549405\" class=\"text\">\n\t\t\n<p>Bu nedenle, \u0131\u015f\u0131n\u0131n kaplad\u0131\u011f\u0131 k\u00fcresel a\u00e7\u0131y\u0131 hesaplar ve bunu kandela de\u011feri (veya milikandela de\u011ferinin 1\/1000\u2018i) ile \u00e7arparsan\u0131z, kabaca \u0131\u015f\u0131k ak\u0131s\u0131n\u0131 (l\u00fcmen cinsinden) elde edebilirsiniz! Ancak, \u0131\u015f\u0131n e\u015fit olarak da\u011f\u0131lmad\u0131\u011f\u0131ndan ve t\u00fcm \u0131\u015f\u0131k \u0131\u015f\u0131n i\u00e7inde bulunmad\u0131\u011f\u0131ndan, bu hesaplama yaln\u0131zca yakla\u015f\u0131kt\u0131r. L\u00fcmenlerin \u0131\u015f\u0131n a\u00e7\u0131s\u0131 ve kandelaya g\u00f6re hesaplanmas\u0131 kolayca +100% ile -50% aras\u0131nda de\u011fi\u015fen hatalara yol a\u00e7abilir. Nominal \u0131\u015f\u0131n genellikle ana \u0131\u015f\u0131n\u0131 \u00e7evreleyen ikincil \u2019halo' \u0131\u015f\u0131nlar\u0131 hesaba katmad\u0131\u011f\u0131ndan, 8 derece veya daha d\u00fc\u015f\u00fck \u0131\u015f\u0131n a\u00e7\u0131lar\u0131 i\u00e7in ger\u00e7ek l\u00fcmen \u00e7\u0131k\u0131\u015f\u0131 tipik olarak bu form\u00fcl\u00fcn \u00f6ng\u00f6rd\u00fc\u011f\u00fcnden daha y\u00fcksektir. Ayr\u0131ca baz\u0131 \u0131\u015f\u0131n a\u00e7\u0131s\u0131 de\u011ferlerinin a\u015f\u0131r\u0131 iyimser oldu\u011fu ve potansiyel olarak al\u0131nan ger\u00e7ek \u0131\u015f\u0131k ak\u0131s\u0131 ile ilgili \u015fi\u015firilmi\u015f beklentilere yol a\u00e7t\u0131\u011f\u0131 unutulmamal\u0131d\u0131r.<\/p>\n\t\t\n<style>\n#text-1592549405 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-1592549405 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1034426661\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1034426661 {\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-550411291\">\n\n\t<div id=\"col-1328202097\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n\t<div id=\"text-686000573\" class=\"text\">\n\t\t\n<h2><strong><b>4. <\/b><\/strong><b><\/b><strong>\u00d6zet<\/strong><\/h2>\n\t\t\n<style>\n#text-686000573 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-686000573 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-686000573 {\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-1328202097 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n<div class=\"row align-center\"  id=\"row-792548813\">\n\n\t<div id=\"col-1100225398\" 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-4092335607\" class=\"text\">\n\t\t\n<p>\u00d6zetle, d\u00f6rt optik birim - l\u00fcmen, l\u00fcks, nit ve kandela - her biri \u0131\u015f\u0131\u011f\u0131n \u00f6zelliklerini farkl\u0131 perspektiflerden tan\u0131mlar ve toplu olarak ayd\u0131nlatmay\u0131 kavrad\u0131\u011f\u0131m\u0131z ve \u00f6l\u00e7t\u00fc\u011f\u00fcm\u00fcz temel k\u0131staslar\u0131 olu\u015fturur.<\/p>\n<p>Lumens focus on the total amount of light emitted by a light source, quantifying luminous flux to indicate how much light a source can produce; lux, however, concerns the luminous flux received per unit area by an illuminated object, reflecting the degree to which an object is lit and revealing how brightly a surface is illuminated. The nit, as a unit of luminance, applies to area sources by combining luminous intensity with the emitting area. It is commonly used to describe the visual brightness of luminous surfaces such as displays. The candela, meanwhile, is the core metric for the luminous intensity of point sources. It characterises a light source&#8217;s ability to concentrate light in a specific direction, revealing how intensely the source itself emits light.<\/p>\n\t\t\n<style>\n#text-4092335607 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-4092335607 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1836583092\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1836583092 {\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>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":3245,"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-3237","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 lumens, lux, nits, and candela? 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