Latest Publications

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
This Technical Report has been prepared by Technical Committee (TC) 4-55 of CIE Division 4 "Transportation and Exterior Applications" (formerly TC 5-26 of Division 5 "Exterior Lighting and Other Applications”) and has been approved by the Board of Administration and by Division 4 of the Commission... more
  April 23, 2019  CIE Position Statement There have been a number of reports in the media about the risk to human health following exposure to light from sources such as light emitting diodes (LEDs), referring to the term “blue light hazard” (BLH). This term has been inaccurately used to represent... more
This Draft International Standard is a supplement to CIE S 025:2015 Test Method for LED Lamps, LED Luminaires and LED Modules, which specifies the requirements for measurement of electrical, photometric, and colorimetric quantities of OLED Luminaires and OLED Light Sources. These sources were not... 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...