Latest Publications

  The fast rate at which solid-state light sources can change their luminous output is one of the main drivers behind the revolution in the lighting industry and applications of lighting. The fast rate of the intensity change means that a modulation of the luminous output, both intended and... more
  A colour appearance model provides a viewing-condition-specific method for the transformation of the tristimulus values, X, Y, Z, to or from perceptual attribute correlates.This publication describes a specific colour appearance model, CIECAM16, which may be useful for colour management systems,... more
  There are several terms which describe the Planckian radiation temperature for light sources, including radiance temperature, colour temperature, correlated colour temperature, distribution temperature and ratio temperature. This document provides descriptions of these terms, information on their... more
  The purpose of photometry is to measure light as perceived by the human eye. The brightness of a luminous surface depends not only on the amount of radiation it emits, transmits or reflects, but also on its spectral composition and on the visual response function of the observer viewing it.... more

Latest News and Events

  May 16 is the day to celebrate the International Day of Light (IDL). The CIE is proud to be a...
The Divisions have several tutorials in the pipeline, some to be held this year and some in 2023, some...
  This CIE Technical Committee (TC) is chaired by Martine Knoop (DE). The aim of this TC is to review...
  Virtual reality technology is an important strategic field and will change the way we live and work...