{"id":2500,"date":"2017-11-02T16:34:26","date_gmt":"2017-11-02T16:34:26","guid":{"rendered":"http:\/\/stage.c7307.cloudnet.cloud\/news\/faq\/whats-the-difference-between-theoretical-operational-lumens\/"},"modified":"2022-05-18T08:58:31","modified_gmt":"2022-05-18T06:58:31","slug":"whats-the-difference-between-theoretical-operational-lumens","status":"publish","type":"faq","link":"https:\/\/www.nordiclights.com\/zh-hans\/faq\/led\/whats-the-difference-between-theoretical-operational-lumens\/","title":{"rendered":"What&#8217;s the difference between Theoretical &#038; Operational lumens?"},"content":{"rendered":"<p>A Lumen is the unit of measurement of the complete quantity of light emitted by a light source \u2013 the luminous flux.<\/p>\n<p>Lux is the quantity of luminous flux on a surface. It decreases by the square of the distance (inverse square law) of the surface from the light source:<\/p>\n<p>E(lx) = luminous flux (lm) \/ area (m2).<\/p>\n<p>What is the difference between a Lumen and a Candela?<\/p>\n<p>Lumen = Luminous flux = The complete quantity of light emitted by a source.<\/p>\n<p>Candela = Luminous Intensity = Quantity of light radiated in a particular direction.<\/p>\n","protected":false},"template":"","class_list":["post-2500","faq","type-faq","status-publish","hentry","faq-categories-led"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What&#039;s the difference between Theoretical &amp; Operational lumens? - NORDIC LIGHTS\u00ae - Nordic Lights Ltd.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.nordiclights.com\/faq\/led\/whats-the-difference-between-theoretical-operational-lumens\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What&#039;s the difference between Theoretical &amp; Operational lumens? 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