IMPLEMENTATION OF CIE 191 MESOPIC PHOTOMETRY - ONGOING AND FUTURE ACTIONS

摘要

The use of mesopic photometry will promote the development of mesopically optimised lighting products. It will give the manufacturers foundations on which to develop light sources that are optimised for low light level applications. This will result in better energy-efficiency and visual effectiveness in outdoor lighting conditions. The paper will introduce the CIE 191 system for mesopic photometry and discuss its implications for outdoor lighting. A remaining problem and challenge in implementing mesopic photometry is the definition of the visual adaptation field in e.g. dynamic night-time traffic conditions. This is also the concern of the CIE technical committee (CIE JTC 001) established in January 2012, which aims to provide international guidelines and specifications for implementing mesopic photometry. The ongoing and intended actions of the JTC are presented.