The Illuminating Engineering Society of North America (IES) announces the publication of IES Method for Evaluating Light Source Color Rendition (TM-30-15).

TM-30-15 describes a method for evaluating light source colour rendition, quantifying the fidelity through a Fidelity Index (Rf) and gamut through a Gamut Index (Rg) of a light source.

The method also generates a color vector graphic that indicates average hue and chroma shifts, which helps with interpreting the values of Rf and Rg.

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【Lighting Knowledge】TM-30-15
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