{"id":93888,"date":"2026-06-11T01:22:54","date_gmt":"2026-06-11T08:22:54","guid":{"rendered":"https:\/\/gvmled.com\/?p=93888"},"modified":"2026-06-11T02:12:47","modified_gmt":"2026-06-11T09:12:47","slug":"lux-vs-lumens-continuous-light","status":"publish","type":"post","link":"https:\/\/gvmled.com\/ja\/lux-vs-lumens-continuous-light\/","title":{"rendered":"Lux vs Lumens in Continuous Light"},"content":{"rendered":"<p class=\"wp-block-paragraph\">If you&#8217;re shopping for a <strong>continuous light<\/strong>\u200b and have ever stared at two LED spec sheets trying to figure out which one is actually brighter, you&#8217;ve probably noticed that one says <em>lumens<\/em>and the other says <em>lux<\/em>. They&#8217;re not the same number, and they&#8217;re definitely not interchangeable. Picking the wrong measurement for your photography could mean spending $500 on a light that looks bright on paper but falls short at the distance you actually shoot. Let me clear this up.<\/p><div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>\u76ee\u6b21<\/h2><nav><ul><li><a href=\"#what-is-lux-and-what-are-lumens\">What Is Lux and What Are Lumens?<\/a><\/li><li><a href=\"#why-lux-matters-more-for-continuous-light\">Why Lux Matters More for Continuous Light<\/a><\/li><li><a href=\"#how-to-calculate-lux-for-your-continuous-light-setup\">How to Calculate Lux for Your Continuous Light Setup<\/a><\/li><li><a href=\"#lux-requirements-for-different-genres-using-continuous-light\">Lux Requirements for Different Genres Using Continuous Light<\/a><\/li><li><a href=\"#best-continuous-lights-with-high-lux-output\">Best Continuous Lights with High Lux Output<\/a><\/li><li><a href=\"#why-lux-defines-a-quality-continuous-light\">Why Lux Defines a Quality Continuous Light<\/a><\/li><li><a href=\"#faq-continuous-light\">FAQ-Continuous Light<\/a><\/li><\/ul><\/nav><\/div><h2 id=\"what-is-lux-and-what-are-lumens\" class=\"wp-block-heading\">What Is Lux and What Are Lumens?<\/h2><p class=\"wp-block-paragraph\"><strong>Lumens (lm)<\/strong>\u200b measure the <em>total<\/em>amount of visible light a source emits in every direction. It&#8217;s a measure of the light&#8217;s raw output, full stop. If you&#8217;re a flashlight manufacturer, lumens is your number.<\/p><p class=\"wp-block-paragraph\"><strong>Lux (lx)<\/strong>\u200b measures the <em>amount of light falling on a specific surface area<\/em>\u2014 specifically, lumens per square meter. So lux is what actually reaches your subject. If you&#8217;re a photographer or cinematographer choosing a <strong>continuous light<\/strong>, lux is your number.<\/p><p class=\"wp-block-paragraph\">The relationship is simple: <strong>1 lux = 1 lumen per square meter<\/strong>. The catch is that lux drops dramatically with distance, while lumens don&#8217;t.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"576\" src=\"https:\/\/gvmled.com\/wp-content\/uploads\/2026\/01\/650_0109-8.png\" alt=\"\" class=\"wp-image-88178\" title=\"\" srcset=\"https:\/\/gvmled.com\/wp-content\/uploads\/2026\/01\/650_0109-8.png 768w, https:\/\/gvmled.com\/wp-content\/uploads\/2026\/01\/650_0109-8-300x225.png 300w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure><\/div><h2 id=\"why-lux-matters-more-for-continuous-light\" class=\"wp-block-heading\">Why Lux Matters More for Continuous Light<\/h2><p class=\"wp-block-paragraph\">When you&#8217;re working with a <strong>continuous light<\/strong>\u200b in the studio, you don&#8217;t care how much light the bulb spits out in all directions. You care about how much light hits the subject standing 1.5 meters away from it. That&#8217;s a lux measurement.<\/p><p class=\"wp-block-paragraph\">This is also why two <strong>continuous lights<\/strong>\u200b with the same lumen rating can perform very differently in real use. A bare bulb throwing light in 360 degrees loses most of its output to the walls and ceiling. A <strong>continuous light<\/strong>\u200b with a reflector \u2014 like the <strong><a href=\"https:\/\/gvmled.com\/ja\/gvm-pro-sd650b\/\">GVM PRO SD650B<\/a><\/strong>\u200b with its standard reflector \u2014 focuses <strong>81,300 lux<\/strong>\u200b on your subject from 1 meter away, while the same wattage without a reflector would give you a fraction of that.<\/p><p class=\"wp-block-paragraph\">When you compare two <strong>continuous lights<\/strong>\u200b for photography, always compare <strong>lux at the same distance<\/strong>\u200b (1m is the industry standard). If one only quotes lumens, ask for the lux spec or walk away.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"1024\" data-src=\"https:\/\/gvmled.com\/wp-content\/uploads\/2025\/10\/PRO-SD650B-1-1024x1024.jpg\" alt=\"\" class=\"wp-image-80193 lazyload\" title=\"\" data-srcset=\"https:\/\/gvmled.com\/wp-content\/uploads\/2025\/10\/PRO-SD650B-1-1024x1024.jpg 1024w, https:\/\/gvmled.com\/wp-content\/uploads\/2025\/10\/PRO-SD650B-1-300x300.jpg 300w, https:\/\/gvmled.com\/wp-content\/uploads\/2025\/10\/PRO-SD650B-1-100x100.jpg 100w, https:\/\/gvmled.com\/wp-content\/uploads\/2025\/10\/PRO-SD650B-1-150x150.jpg 150w, https:\/\/gvmled.com\/wp-content\/uploads\/2025\/10\/PRO-SD650B-1-768x768.jpg 768w, https:\/\/gvmled.com\/wp-content\/uploads\/2025\/10\/PRO-SD650B-1.jpg 1500w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/1024;\" \/><\/figure><\/div><h2 id=\"how-to-calculate-lux-for-your-continuous-light-setup\" class=\"wp-block-heading\">How to Calculate Lux for Your Continuous Light Setup<\/h2><p class=\"wp-block-paragraph\">The inverse square law means that every time you double the distance from your <strong>continuous light<\/strong>, the lux on your subject drops to <strong>one quarter<\/strong>\u200b of the original value. So if a <strong>continuous light<\/strong>\u200b measures 40,000 lux at 1 meter, here&#8217;s what you actually get at typical shooting distances:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8ddd\u96e2<\/th><th>Lux (% of 1m value)<\/th><th>Approx. value from 40,000 lux @ 1m<\/th><\/tr><\/thead><tbody><tr><td>1 m<\/td><td>100%<\/td><td>40,000 lux<\/td><\/tr><tr><td>2 m<\/td><td>25%<\/td><td>10,000 lux<\/td><\/tr><tr><td>3 m<\/td><td>11%<\/td><td>4,400 lux<\/td><\/tr><tr><td>4 m<\/td><td>6.25%<\/td><td>2,500 lux<\/td><\/tr><tr><td>5 m<\/td><td>4%<\/td><td>1,600 lux<\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\">So if you&#8217;re shooting a 3-person interview at 3 meters from your key <strong>continuous light<\/strong>, that &#8220;40,000 lux spec&#8221; gives you just 4,400 lux on the subject. Now do you see why high-lux output matters? It&#8217;s the only way to get usable light at a real working distance.<\/p><p class=\"wp-block-paragraph\"><strong>Quick formula:<\/strong>\u200b Lux at distance D = Lux at 1m \u00f7 D\u00b2 (where D is in meters).<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"768\" height=\"576\" data-src=\"https:\/\/gvmled.com\/wp-content\/uploads\/2026\/01\/650_0109-9.png\" alt=\"gvm650b continuous light\u200b\" class=\"wp-image-88179 lazyload\" title=\"\" data-srcset=\"https:\/\/gvmled.com\/wp-content\/uploads\/2026\/01\/650_0109-9.png 768w, https:\/\/gvmled.com\/wp-content\/uploads\/2026\/01\/650_0109-9-300x225.png 300w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/576;\" \/><\/figure><\/div><h2 id=\"lux-requirements-for-different-genres-using-continuous-light\" class=\"wp-block-heading\">Lux Requirements for Different Genres Using Continuous Light<\/h2><p class=\"wp-block-paragraph\">Different photography and video genres have very different lux needs when using <strong>continuous light<\/strong>. Here&#8217;s what works in real shoots:<\/p><ul class=\"wp-block-list\"><li><strong>Portrait (close, 1\u20132m):<\/strong>\u200b 5,000\u201320,000 lux on the subject. Most modern <strong>continuous LEDs<\/strong>\u200b handle this easily.<\/li>\n\n<li><strong>Group photo \/ wider setup (3\u20134m):<\/strong>\u200b 15,000\u201350,000 lux at 1m on the <strong>continuous light<\/strong>. The further the subject, the brighter the <strong>continuous light<\/strong>\u200b needs to be at the source.<\/li>\n\n<li><strong>Product photography (close, 0.5\u20131m):<\/strong>\u200b 10,000\u201330,000 lux. You can stop down for depth of field.<\/li>\n\n<li><strong>Video at 4K, 24fps, ISO 800:<\/strong>\u200b Around 2,000\u20135,000 lux on the subject is a comfortable range for low-noise footage.<\/li>\n\n<li><strong>Large commercial sets (5m+):<\/strong>\u200b 80,000+ lux at 1m. This is where 500W+ <strong>continuous fixtures<\/strong>\u200b earn their keep.<\/li><\/ul><p class=\"wp-block-paragraph\">The mistake I see most often: a creator buys a 100W panel <strong>continuous light<\/strong>\u200b with a &#8220;high lumen&#8221; rating and wonders why their group videos look dim and noisy. They needed a <strong>continuous light<\/strong>\u200b fixture with a much higher lux-at-1m rating, not a higher lumen count.<\/p><h2 id=\"best-continuous-lights-with-high-lux-output\" class=\"wp-block-heading\">Best Continuous Lights with High Lux Output<\/h2><p class=\"wp-block-paragraph\">Below are two GVM <strong>continuous lights<\/strong>\u200b that deliver serious lux output for studio and on-location work.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e2\u30c7\u30eb<\/th><th>\u529b<\/th><th>Max Lux @ 1m<\/th><th>CRI\/TLCI<\/th><th>\u6700\u9ad8<\/th><\/tr><\/thead><tbody><tr><td>GVM PRO SD650B<\/td><td>650W<\/td><td>81,300 lux<\/td><td>97+<\/td><td>Studio interviews, large product sets, film lighting<\/td><\/tr><tr><td>GVM SD300B-AIO<\/td><td>300 W<\/td><td>221,950 lux<\/td><td>97+<\/td><td>On-location work needing maximum punch per kilogram<\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\">\u306b\u3064\u3044\u3066 <strong>SD650B<\/strong>\u200b is the workhorse <strong>continuous light<\/strong>\u200b for studio shoots \u2014 81,300 lux at 1m means usable light at 4+ meters without maxing out the dimmer. The <strong>SD300B-AIO<\/strong>\u200b is the engineering standout: 221,950 lux from a 300W <strong>continuous light<\/strong>\u200b fixture is exceptional, and it weighs a fraction of the bigger monolights, making it the right choice when you need serious output but can&#8217;t bring a 650W head. Both maintain 97+ color accuracy, so you don&#8217;t trade brightness for color quality.<\/p><h2 id=\"why-lux-defines-a-quality-continuous-light\" class=\"wp-block-heading\">Why Lux Defines a Quality Continuous Light<\/h2><p class=\"wp-block-paragraph\">\u4e00\u756a <strong>continuous lights<\/strong>\u200b share one thing: they quote their output in lux at a specified distance, not just lumens. A high-quality <strong>continuous light<\/strong>\u200b like the GVM SD300B-AIO delivers 221,950 lux at 1 meter because its optical design concentrates that output where you need it \u2014 on your subject.<\/p><p class=\"wp-block-paragraph\">When you understand lux vs lumens, you stop comparing <strong>continuous lights<\/strong>\u200b by wattage alone. You start comparing them by how much usable light they put on your subject at your working distance. That&#8217;s the difference between a well-lit set and a disappointing purchase.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"768\" height=\"576\" data-src=\"https:\/\/gvmled.com\/wp-content\/uploads\/2025\/06\/rgb-video-lights-faq-icon.jpg\" alt=\"A stylized question mark, symbolizing the frequently asked questions about 300W LED video lights and lighting solutions for filmmakers.\" class=\"wp-image-73444 lazyload\" title=\"\" data-srcset=\"https:\/\/gvmled.com\/wp-content\/uploads\/2025\/06\/rgb-video-lights-faq-icon.jpg 768w, https:\/\/gvmled.com\/wp-content\/uploads\/2025\/06\/rgb-video-lights-faq-icon-300x225.jpg 300w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/576;\" \/><\/figure><\/div><h2 id=\"faq-continuous-light\" class=\"wp-block-heading\">FAQ-Continuous Light<\/h2><p class=\"wp-block-paragraph\"><strong>Are lumens or lux more important for continuous light photography?<\/strong><\/p><p class=\"wp-block-paragraph\">Lux is what matters for <strong>continuous light<\/strong>\u200b photography. Lumens measure total light output, but lux tells you how much light actually reaches your subject. Always compare <strong>continuous lights<\/strong>\u200b by their lux rating at 1 meter.<\/p><p class=\"wp-block-paragraph\"><strong>How many lumens do I need for a continuous light studio setup?<\/strong><\/p><p class=\"wp-block-paragraph\">There&#8217;s no single answer because lumens don&#8217;t measure what reaches your subject. A more useful number: aim for a <strong>continuous light<\/strong>\u200b fixture that delivers at least 20,000 lux at 1 meter for a small studio, and 50,000+ lux at 1m for larger setups.<\/p><p class=\"wp-block-paragraph\"><strong>What is a good lux level for portraits with continuous light?<\/strong><\/p><p class=\"wp-block-paragraph\">For portraits, around <strong>5,000 to 20,000 lux on the subject&#8217;s face<\/strong>\u200b is a comfortable range. You&#8217;ll be working at distances of 1\u20132 meters, so a 200W\u2013300W <strong>continuous LED<\/strong>\u200b at 1m spec of 30,000+ lux gives you plenty of headroom to dim down for soft, natural-looking light.<\/p><p class=\"wp-block-paragraph\"><strong>How does distance affect my continuous light output?<\/strong><\/p><p class=\"wp-block-paragraph\">Lux from your <strong>continuous light<\/strong>\u200b drops with the <strong>square of the distance<\/strong>. Double the distance, you get one quarter of the lux. Triple the distance, you get one ninth. This is why high-lux <strong>continuous light<\/strong>\u200b fixtures at 1m are essential when you need to light subjects at 3+ meters.<\/p><p class=\"wp-block-paragraph\"><strong>Can I convert lumens to lux for a continuous light?<\/strong><\/p><p class=\"wp-block-paragraph\">Not directly, because lux depends on the beam angle and distance. A 5,000-lumen <strong>continuous light<\/strong>\u200b in a tight 30\u00b0 beam can deliver a very high lux at the center, while the same 5,000 lumens in a 120\u00b0 flood will give a much lower lux reading. Always request the manufacturer&#8217;s lux-at-distance spec for fair comparison.<\/p><p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>If you&#8217;re shopping for a continuous light\u200b and have ever stared at two LED spec sheets trying to figure out which one is actually brighter, you&#8217;ve probably noticed that one says lumensand the other says lux. They&#8217;re not the same number, and they&#8217;re definitely not interchangeable. Picking the wrong measurement for your photography could mean spending $500 on a light that looks bright on paper but falls short at the distance you actually shoot. Let me clear this up. What Is Lux and What Are Lumens? Lumens (lm)\u200b measure the totalamount of visible light a source emits in every direction. It&#8217;s a measure of the light&#8217;s raw output, full stop. &#8230; <a title=\"Lux vs Lumens in Continuous Light\" class=\"read-more\" href=\"https:\/\/gvmled.com\/ja\/lux-vs-lumens-continuous-light\/\" aria-label=\"Lux vs Lumens in Continuous Light \u306b\u3064\u3044\u3066\u3055\u3089\u306b\u8aad\u3080\">Read More<\/a><\/p>","protected":false},"author":7,"featured_media":93659,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[307],"tags":[],"class_list":["post-93888","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-light-tips-tricks"],"_links":{"self":[{"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/posts\/93888","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/comments?post=93888"}],"version-history":[{"count":8,"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/posts\/93888\/revisions"}],"predecessor-version":[{"id":93903,"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/posts\/93888\/revisions\/93903"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/media\/93659"}],"wp:attachment":[{"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/media?parent=93888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/categories?post=93888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gvmled.com\/ja\/wp-json\/wp\/v2\/tags?post=93888"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}