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

This volume is published in the publication series Proceedings of the CIE (International Commission on Illumination) with the ISSN no. 3061-015X (print), 3061-0168 (online). More information about the series: https://cie.co.at/publications/proceedings About this volume Keywords… more

The purpose of lighting at night is to improve visual amenity and safety. However, in the design and setting-up of lighting installations one should avoid disproportionate unwanted effects.Key take-away points from this Position Statement are described below:There are benefits of light at night,… more