Encyclopedia of Color Science and Technology

Living Edition
| Editors: Ronnier Luo

CIE Standard Illuminants and Sources

  • János Schanda
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27851-8_324-1



CIE Standard Illuminants

Illuminants A and D65 defined by the CIE in terms of relative spectral power distributions [1].

Note 1: These illuminants are intended to represent:
  • A: Planckian radiation at a temperature of about 2,856 K

  • D65: The relative spectral power distribution representing a phase of daylight with a correlated color temperature of approximately 6,500 K (called also “nominal correlated color temperature of the daylight illuminant”)

Note 2: Illuminants B and C and other D illuminants, previously denoted as “standard illuminants,” should now be termed “CIE illuminants.”

CIE Standard Sources

Artificial sources specified by the CIE whose radiation approximate CIE standard illuminants.

Note: CIE sources are artificial sources that represent CIE illuminants.


As shown already in the section Definitions, one has to distinguish between illuminants and sources: The term...


Correlate Color Temperature Optical Brightener Artificial Source Spectral Power Distribution International Temperature Scale 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.University of PannoniaVeszprémHungary