ISO/CIE 11664-2:2022

Colorimetry — Part 2: CIE standard illuminants

This document defines three CIE standard illuminants for use in colorimetry: CIE standard illuminant A for the representation of typical tungsten-filament lighting, CIE standard illuminant D65 for the representation of average daylight having a correlated colour temperature of approximately 6?500?K and CIE standard illuminant D50 for the representation of daylight with a correlated colour temperature of approximately 5?000?K. Values of the relative spectral power distribution of the three illuminants are included in this document.