Development of the IES method for evaluating the color rendition of light sources

David, Aurelien; Fini, Paul T.; Houser, Kevin W.; Ohno, Yoshi; Royer, Michael P.; USA, Richland Washington; Smet, Kevin A. G.; Wei, Minchen; Whitehead, Lorne

doi:10.1364/OE.23.015888

Title: Development of the IES method for evaluating the color rendition of light sources

Journal Article · Mon Jun 08 00:00:00 EDT 2015 · Optics Express

DOI:https://doi.org/10.1364/OE.23.015888· OSTI ID:1209003

David, Aurelien ^[1]; Fini, Paul T. ^[2]; Houser, Kevin W. ^[3]; Ohno, Yoshi ^[4]; Royer, Michael P. ^[5]; USA, Richland Washington; Smet, Kevin A. G. ^[6]; Wei, Minchen ^[3]; Whitehead, Lorne ^[7]

Soraa Inc., Fremont CA (United States)
Cree Inc., Goleta, CA (United States)
Dept. of Architectural Engineering, Penn State University, State College, PA (United States)
National Institute of Standards and Technology, Gaithersburg, MD (United States)
Pacific Northwest National Laboratory
Light&Lighting Laboratory/ESAT, KU Leuven, 3000 Ghent, Belgium
Department of Physics and Astronomy, University of British Columbia, Vancouver Canada

We have developed a two-measure system for evaluating light sources’ color rendition that builds upon conceptual progress of numerous researchers over the last two decades. The system quantifies the color fidelity and color gamut (change in object chroma) of a light source in comparison to a reference illuminant. The calculations are based on a newly developed set of reflectance data from real samples uniformly distributed in color space (thereby fairly representing all colors) and in wavelength space (thereby precluding artificial optimization of the color rendition scores by spectral engineering). The color fidelity score R_f is an improved version of the CIE color rendering index. The color gamut score R_g is an improved version of the Gamut Area Index. In combination, they provide two complementary assessments to guide the optimization of future light sources. This method summarizes the findings of the Color Metric Task Group of the Illuminating Engineering Society of North America (IES). It is adopted in the upcoming IES TM-30-2015, and is proposed for consideration with the International Commission on Illumination (CIE).

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 1209003

Journal Information:: Optics Express, Vol. 23, Issue 12; ISSN 1094-4087

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 143 works

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