{"id":3972,"date":"2025-09-23T01:43:37","date_gmt":"2025-09-23T01:43:37","guid":{"rendered":"https:\/\/pergolalights.net\/?p=3972"},"modified":"2026-04-03T08:07:46","modified_gmt":"2026-04-03T08:07:46","slug":"why-phone-photos-flickering-lights-dont-indicate-faulty-bulbs","status":"publish","type":"post","link":"https:\/\/pergolalights.net\/ru\/why-phone-photos-flickering-lights-dont-indicate-faulty-bulbs\/","title":{"rendered":"\u0422\u0435\u043b\u0435\u0444\u043e\u043d \u0441\u043d\u0438\u043c\u0430\u0435\u0442 \u043c\u0435\u0440\u0446\u0430\u043d\u0438\u0435 \u0441\u0432\u0435\u0442\u0430 \u2260 \u0441\u0432\u0435\u0442\u0438\u043b\u044c\u043d\u0438\u043a \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043c\u0435\u0440\u0446\u0430\u0435\u0442!"},"content":{"rendered":"<div class=\"row align-center\"  id=\"row-999681358\">\n\n\t<div id=\"col-540925900\" 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 class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_384223291\">\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=\"977\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights.webp\" class=\"attachment-original size-original\" alt=\"A phone capturing flickering lights\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights.webp 2000w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights-800x391.webp 800w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights-1400x684.webp 1400w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights-768x375.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights-1536x750.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights-18x9.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/A-phone-capturing-flickering-lights-510x249.webp 510w\" 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_384223291 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-788926791\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-788926791 {\n  padding-top: 30px;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"row\"  id=\"row-900536311\">\n\n\t<div id=\"col-1754888977\" 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-3995255382\" class=\"text\">\n\t\t\n<h2><strong><b>1. If you take a photo of a light bulb with your phone and see flickering, does that mean the bulb is faulty?<\/b><\/strong><\/h2>\n\t\t\n<style>\n#text-3995255382 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-3995255382 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-3995255382 {\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-1754888977 > .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-221828075\" class=\"text\">\n\t\t\n<p>Many people habitually point their phones at lights and take photos. If black bars or flickering appear in the image, they immediately conclude: \u201cThis light has flicker\u2014it&#8217;s unhealthy.\u201d<\/p>\n\t\t\n<style>\n#text-221828075 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-221828075 {\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_591511780\">\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=\"977\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering.webp\" class=\"attachment-original size-original\" alt=\"your phone and see flickering\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering.webp 2000w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering-800x391.webp 800w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering-1400x684.webp 1400w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering-768x375.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering-1536x750.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering-18x9.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/your-phone-and-see-flickering-510x249.webp 510w\" 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_591511780 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2349044735\" class=\"text\">\n\t\t\n<p>But the truth is: the flickering captured by your phone does not mean the light fixture actually emits harmful stroboscopic effects.<\/p>\n\t\t\n<style>\n#text-2349044735 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2349044735 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-985002273\" class=\"text\">\n\t\t\n<p>This is merely a phenomenon caused by the camera and lighting being \u201cout of sync.\u201d<\/p>\n<p>In other words, while your phone can \u201csee\u201d the flickering, it cannot \u201cmeasure\u201d it.<\/p>\n\t\t\n<style>\n#text-985002273 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-985002273 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1664330809\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1664330809 {\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-928751450\">\n\n\t<div id=\"col-2101100248\" 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-3441038613\" class=\"text\">\n\t\t\n<h2><strong><b>2. <\/b><\/strong><strong>Why can&#8217;t I see it with my eyes, but my phone can capture it?<\/strong><\/h2>\n\t\t\n<style>\n#text-3441038613 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-3441038613 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-3441038613 {\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-2101100248 > .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-1661944695\">\n\n\t<div id=\"col-891068868\" 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-3878861149\" class=\"text\">\n\t\t\n<p>The human eye and a camera perceive light in entirely different ways:<\/p>\n<ul>\n<li>The human eye possesses \u201cpersistence of vision,\u201d acting as a natural \u201cfilter.\u201d As long as the flicker frequency of light exceeds approximately 80Hz, our brain automatically \u201csmooths\u201d it out, making it appear as steady illumination.<\/li>\n<li>Cameras, however, are far more literal. They function as sampling instruments, faithfully recording every instantaneous fluctuation in brightness from a light source.<\/li>\n<\/ul>\n<p>So when the light flickers at frequencies of 100Hz, 120Hz, or even thousands of Hz:<\/p>\n<ul>\n<li>Human eyes \u2192 Ignore it.<\/li>\n<li>Smartphones \u2192 Capture it exactly as it is.<\/li>\n<\/ul>\n\t\t\n<style>\n#text-3878861149 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-3878861149 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1290255110\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1290255110 {\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-1786380288\">\n\n\t<div id=\"col-169511707\" 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-3961552825\" class=\"text\">\n\t\t\n<h2><strong><b>3. <\/b><\/strong><strong>Why is the light flickering?<\/strong><\/h2>\n\t\t\n<style>\n#text-3961552825 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-3961552825 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-3961552825 {\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-169511707 > .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-1198624678\" 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-2548788154\" class=\"text\">\n\t\t\n<p>In reality, most lighting is not \u201ccompletely stable\u201d:<\/p>\n<p>1.AC Power Supply<\/p>\n<ul>\n<li>Under a 50Hz grid, lighting exhibits 100Hz brightness fluctuations;<\/li>\n<li>under a 60Hz grid, these fluctuations reach 120Hz.<\/li>\n<\/ul>\n<p>2.LED Driver Power Supply<\/p>\n<ul>\n<li>Some driver circuits lack stability, causing output current \u201cripple\u201d that results in noticeable brightness fluctuations.<\/li>\n<\/ul>\n<p>3.PWM Dimming<\/p>\n<ul>\n<li>Many dimmable LEDs use a \u201crapid on-off\u201d method to control brightness.<\/li>\n<li>While imperceptible to the human eye, cameras can capture the \u201coff\u201d moment, resulting in visible stripes in the image.<\/li>\n<\/ul>\n\t\t\n<style>\n#text-2548788154 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2548788154 {\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_1680798050\">\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=\"977\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming.webp\" class=\"attachment-original size-original\" alt=\"PWM Dimming\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming.webp 2000w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming-800x391.webp 800w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming-1400x684.webp 1400w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming-768x375.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming-1536x750.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming-18x9.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/3.PWM-Dimming-510x249.webp 510w\" 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_1680798050 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-1663020322\" class=\"text\">\n\t\t\n<p>\u2191Image: A smartphone screen using PWM dimming, which may exhibit banding when photographed.<\/p>\n<p>So, the lights do indeed flicker, only we don&#8217;t usually see it.<\/p>\n\t\t\n<style>\n#text-1663020322 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-1663020322 {\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-1198624678 > .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-387964973\">\n\n\t<div id=\"col-1239534805\" 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=\"gap-1841502382\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1841502382 {\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-1403745972\">\n\n\t<div id=\"col-1735433807\" 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-3737259003\" class=\"text\">\n\t\t\n<h2><strong><b>4. <\/b><\/strong><b><\/b><strong>Why does it look more obvious when photographed with a phone?<\/strong><\/h2>\n\t\t\n<style>\n#text-3737259003 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-3737259003 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-3737259003 {\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-1735433807 > .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-1780478507\">\n\n\t<div id=\"col-325877148\" 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-2683109013\" class=\"text\">\n\t\t\n<p>The key here is the camera&#8217;s \u201csampling method\u201d:<\/p>\n<ul>\n<li>Shutter Speed: If the shutter only covers a small portion of the light wave, it will cause uneven brightness in the image.<\/li>\n<li>Frame Rate (FPS): When the frame rate is out of sync with the frequency of light, rolling black bars appear.<\/li>\n<li>Rolling shutter: Most smartphone cameras use progressive scanning. Since light sources vary in brightness during exposure of different lines \u2192 stripes appear.<\/li>\n<\/ul>\n<p>This also explains why strobing is particularly noticeable in slow-motion videos. High frame rates \u201camplify\u201d each fluctuation in light.<\/p>\n\t\t\n<style>\n#text-2683109013 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2683109013 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-986474859\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-986474859 {\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-443365827\">\n\n\t<div id=\"col-1200002473\" 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-493229142\" class=\"text\">\n\t\t\n<h2><b>5.\u00a0<\/b><strong><b>Why can&#8217;t a phone&#8217;s stroboscopic effect be used for detection?<\/b><\/strong><\/h2>\n\t\t\n<style>\n#text-493229142 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-493229142 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-493229142 {\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-1200002473 > .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-1348093926\">\n\n\t<div id=\"col-723078313\" 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-3088114128\" class=\"text\">\n\t\t\n<p>Many people mistakenly believe that \u201cstripes captured on a phone = faulty lighting.\u201d This is actually a misconception for three reasons:<\/p>\n<ol>\n<li>No Standard<\/li>\n<\/ol>\n<ul>\n<li>Scientific flicker detection employs a comprehensive set of metrics, such as flicker percentage, flicker index, SVM, and PstLM.<\/li>\n<li>The stripes visible in phone photos do not correspond to these metrics.<\/li>\n<\/ul>\n<ol start=\"2\">\n<li>Results are inconsistent.<\/li>\n<\/ol>\n<ul>\n<li>The same light source produces completely different effects when photographed with different phones, shutter speeds, and frame rates.<\/li>\n<li>Without a unified standard, results cannot be compared.<\/li>\n<\/ul>\n<ol start=\"3\">\n<li>Misinterpretation is common<\/li>\n<\/ol>\n<ul>\n<li>High-frequency PWM dimming: Safe for the human eye, but smartphones will inevitably capture flickering.<\/li>\n<li>Low-frequency fluctuations: May contribute to eye fatigue, but smartphones may not detect them.<\/li>\n<\/ul>\n<p>Therefore, flickering captured by smartphones is merely a \u201cphenomenon\u201d and cannot serve as evidence to determine whether a light fixture is healthy.<\/p>\n\t\t\n<style>\n#text-3088114128 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-3088114128 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-727343594\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-727343594 {\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-1209211489\">\n\n\t<div id=\"col-720426843\" 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-1897258837\" class=\"text\">\n\t\t\n<h2><strong><b>6. <\/b><\/strong><strong>How should it be measured?<\/strong><\/h2>\n\t\t\n<style>\n#text-1897258837 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-1897258837 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-1897258837 {\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-720426843 > .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-1850220166\" 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-140264634\" class=\"text\">\n\t\t\n<p>The truly scientific approach involves utilising professional instruments such as stroboscopes or spectrometers. These devices can quantify light fluctuations and calculate metrics including Flicker Percent, Flicker Index, and Standard Voltage Deviation (SVM).<\/p>\n\t\t\n<style>\n#text-140264634 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-140264634 {\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_244482128\">\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=\"1051\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects.webp\" class=\"attachment-original size-original\" alt=\"Licht Ultra spectrophotometer for testing stroboscopic effects\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects.webp 2000w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects-761x400.webp 761w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects-1400x736.webp 1400w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects-768x404.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects-1536x807.webp 1536w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects-18x9.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/09\/Licht-Ultra-spectrophotometer-for-testing-stroboscopic-effects-510x268.webp 510w\" 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_244482128 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-1444613630\" class=\"text\">\n\t\t\n<p>\u2191Image: Licht Ultra spectrophotometer for testing stroboscopic effects<\/p>\n\t\t\n<style>\n#text-1444613630 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-1444613630 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-3200504776\" class=\"text\">\n\t\t\n<p>These are the parameters recognised by international standards such as CIE, IEC, and IEEE, and can be used to compare the merits of different luminaires.<\/p>\n<p>One might understand it thus:<\/p>\n<ul>\n<li>Mobile phone stroboscopic effect detection = a subjective observation, enabling you to \u2018suspect\u2019 a light source may be faulty;<\/li>\n<li>Professional stroboscopic testing = objective measurement, capable of truly \u2018verifying\u2019 whether a light source is functioning correctly.<\/li>\n<\/ul>\n\t\t\n<style>\n#text-3200504776 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-3200504776 {\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-1850220166 > .col-inner {\n  margin: 0px 0px -25px 0px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"gap-2045744361\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-2045744361 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"row align-center\"  id=\"row-834978694\">\n\n\t<div id=\"col-1490852730\" 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-1332137227\" class=\"text\">\n\t\t\n<h2><strong><b>7. <\/b><\/strong><strong><b>What will the future hold?<\/b><\/strong><\/h2>\n\t\t\n<style>\n#text-1332137227 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-1332137227 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-1332137227 {\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-1490852730 > .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-1063837827\" 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-2047007723\" class=\"text\">\n\t\t\n<ul>\n<li>Lighting Industry: An increasing number of luminaires now bear the \u201cflicker-free\u201d designation, with high-quality driver power supplies becoming increasingly commonplace. This not only enhances suitability for photography but also alleviates visual fatigue.<\/li>\n<li>Camera Industry: Once global shutter technology becomes widespread, the banding issues caused by rolling shutter will be fundamentally eliminated.<\/li>\n<\/ul>\n\t\t\n<style>\n#text-2047007723 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-2047007723 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1167219402\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1167219402 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-1063837827 > .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-890348894\">\n\n\t<div id=\"col-1303550672\" 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-2523900497\" class=\"text\">\n\t\t\n<h2><strong><b>8. <\/b><\/strong><strong><b>\u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/b><\/strong><\/h2>\n\t\t\n<style>\n#text-2523900497 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n  color: rgb(255,255,255);\n}\n#text-2523900497 > * {\n  color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #text-2523900497 {\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-1303550672 > .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-559258273\" 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-4139841595\" class=\"text\">\n\t\t\n<ul>\n<li>\n<p>Many people like to use their mobile phones as \u201cdetectors\u201d, but the reality is:<\/p>\n<p>Capturing stripes \u2260 the light is necessarily harmful;<\/p>\n<p>Not capturing stripes \u2260 the light is necessarily safe.<\/p>\n<p>Only professional instruments and standardised testing metrics can truly tell the story.<\/p>\n<p>So next time someone pulls out their phone to photograph a light and claims \u201cthis light has flicker\u201d, you can confidently tell them:<\/p>\n<p>&#8216;Mobile phones cannot detect flicker.&#8217;<\/p>\n<p>Note: When testing flicker with a portable spectrophotometer, attention should be paid to the test direction. For comparing luminaire flicker, horizontal testing may be employed, whereas vertical testing is required for assessing flicker from the human eye&#8217;s perspective. Values obtained from these two approaches often differ significantly. This discrepancy arises because the vertical plane receives both direct and reflected light from multiple luminaires at wide angles. Furthermore, temporal light modulation (TLM) variations from different drivers are more readily superimposed in this direction, potentially generating beat effects. Consequently, flicker perception is typically more pronounced vertically than horizontally. Spatial lighting design should therefore prioritise addressing flicker perception from the vertical plane.<\/p>\n<\/li>\n<\/ul>\n\t\t\n<style>\n#text-4139841595 {\n  font-size: 0.75rem;\n  line-height: 1.5;\n}\n@media (min-width:550px) {\n  #text-4139841595 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1848090839\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1848090839 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-559258273 > .col-inner {\n  margin: 0px 0px -25px 0px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":3981,"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-3972","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=\"Discover why flickering lights captured on your phone aren&#039;t a sign of faulty bulbs. 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