http://personal-view.com/faqs/ 2026-04-06T10:57:46+00:00 http://personal-view.com/faqs/ http://personal-view.com/faqs/lib/tpl/dokuwiki/images/favicon.ico text/html 2017-08-16T14:09:35+00:00 http://personal-view.com/faqs/laboratory/measuring-lights-faq?rev=1502892575&do=diff Basic definitions Definitions provided from <https://www.konicaminolta.eu/fileadmin/content/eu/Measuring_Instruments/4_Learning_Centre/L_D/The_language_of_Light/language_of_light.pdf> Luminous Flux Illuminance Luminance Measuring Illuminance It is not so simple as it can look, as you need sensor with proper spectral response as well as proper integration hemisphere.