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【Technical articles】Color Design and Analysis in LightTools

2018.07

Charting and Analysis Options
Spectral Analysis, CRI, CQS, and GAI
Among LightTools’ color analysis options, you will find spectral analysis and calculation of the Color Rendering Index (CRI) with the values for each of the eight standard color swatches (TCS1-TCS8) as well as the seven additional color swatches (TCS9-TCS15) used to test more vivid colors and skin tones. The chromaticity distance (distance from the blackbody curve) is also calculated. In addition, LightTools includes the newer Color Quality Scale (CQS) and Gamut Area Index (GAI) metrics. CQS is similar to CRI, but instead uses 15 saturated colors and helps to address shortcomings of the CRI standard, especially for commercial applications and when measuring the color rendering effectiveness of solid-state lighting. GAI measures the overall color area encompassed by a source, making use of the CRI swatches in CIE u’v’ color space. The CQS colors and chart are shown in Figure 1.

Figure 1: CQS swatch calculations and CQS chart
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Color-Design-Analysis-In-LightTools
2018-07-23 16:20:00
2018-07-23 16:20:00
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