NIST Outlines Proposed Metric CQS to Replace CRI
Source/Type:  LIGHTimes Online - News - Staff reports

Author: LIGHTimes News Staff

June 15, 2010... The National Institute of Standards and Technology has issued a paper outlining the methodology for a proposed standard to replace the commonly used Color Rendering Index (CRI). Critics of the CRI measurement are quick to point out its limitations and the history of the measurement as a way to compare fluorescent lighting.

The NIST notes that CRI is a 40-year-old measurement that has issues when used to evaluate white LED lighting. The NIST's technical committee TC 1-62 concluded that the CRI score does not correlate well with the visual evaluation in many cases. Some of these cases include instances of color saturation and color shift that can change the color discrimination ability and visual clarity of a given light. In such cases a high CRI may not actually mean good light quality.

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