Latest Publications

In 1995 the CIE Technical Committee 3-13 developed the Unified Glare Rating (UGR) to predict discomfort glare for indoor lighting systems. For practical reasons, the UGR is based on the average source luminance. The introduction of LEDs in general lighting enabled many new luminaire designs,... more
This document was prepared by the International Commission on Illumination (CIE) in cooperation with Technical Committee ISO/TC 274, Light and lighting. This first edition of ISO/CIE 17166 cancels and replaces ISO 17166:1999 | CIE S 007-1998, of which it constitutes a minor revision. The document... more
The properties of illuminance meters and luminance meters are characterized by a number of selected quality indices defined in ISO/CIE 19476:2014 “Characterization of the Performance of Illuminance Meters and Luminance Meters”, previously published as CIE S 023:2013. This Technical Report... more
On 20 May 2019 the International System of Units (SI) underwent a fundamental change. By decision, made at the 26th meeting of the General Conference on Weights and Measures (CGPM) in Versailles, France, all SI units are now defined in terms of seven constants that describe the natural world. This... more

Latest News and Events

  The Canadian National Committee of the CIE is pleased to announce that it will host the biennial joint...
  Registration for this event is now open to participants of the International Scientific and Technical...
We are pleased to announce those who will serve the CIE as Officers of the Commission for the...
CIE Calls for Experts to its new TCs: TC 2-92 International Standard Format for the Electronic Transfer...