The CIE has recommended a method for calculating colour rendering index from the spectral power distribution of a light source. Any error in the power distribution assumed will lead to an error in the colour rendering index. The results of a series of measurements on fluorescent lamps made in a number of laboratories are reported and the significance of the differences in the colour rendering indices obtained is discussed.
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References
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Method of measuring and specifying colour rendering properties of light sources, CIE Publication No. 13 (E-1.3.2.) (1965).
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Moore, J.R., Report on the international inter- comparison of photometric and colorimetric measurements on fluorescent lamps, Report to the CIE, (1963 ).
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