Reducing energy consumption and greenhouse gas emissions while maintaining road safety and limiting the environmental impact of artificial light are increasingly important considerations in road lighting design. Adaptive road lighting (ARL) can help address these challenges by enabling lighting to… more

This publication corrects and replaces CIE 249:2022 Visual Aspects of Time-Modulated Lighting Systems. There was an ambiguity in the original document, where one clause clearly stated that the calculation method provided for SVM needs further verification while another clause implied that this… more

The CIE, through initiatives like the publication of CIE S 026/E:2018 “System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light”, played a key role in establishing standards for measuring how different aspects of light affect our eyes. This includes defining specific… more

This report gives essential information necessary for consistent implementation of the CIE system for mesopic photometry (CIE 191:2010) in practical outdoor lighting applications. It describes how to calculate mesopic quantities according to the CIE system for mesopic photometry, including the… more