Colorimetry - CIE standard illuminants1. SCOPE This International Standard specifies two illuminants for use in colorimetry. The illuminants, which are defined in clauses 4 and 5 of this International Standard, are as follows: a) CIE standard illuminant A This is intended to represent typical, domestic, tungstenfilament lighting. Its relative spectral power distribution is that of a Planckian radiator at a temperature of approximately 2 856 K. CIE standard illuminant A should be used in

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The requirement concerning the IEC quality assessment system has been reviewed

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the pressure is low and values obtained at the test temperature and ambient pressure suffice

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Standardization in this context is a vital constituent to ensure interoperability