The International Commission on Illumination (or Commission internationale de l’éclairage) is a European authority on light, illumination, colour, and colour spaces. They have revised their position statement on maintaining the proper lighting at the proper time and reaffirms its recommendation of CIE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light.
CIE Issues Statement on the Proper Light at the Proper Time
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