Color Quality Scale

Color Quality Scale (CQS) is a quantitative measure of the ability of a light source to reproduce colors of illuminated objects. Developed by researchers at NIST,[1] the measure is a possible answer to the criticism of the widely used color rendering index.[2]

Pousset et al. developed a psychophysical experiment in order to evaluate light quality of LED light sources.[3] It is based on colored samples used in the Color Quality Scale. Predictions of the CQS and results from visual measurements were compared.

Several manufacturers are beginning to publish data on CQS scores of their products, including some who claim light sources with CQS scores up to 97.[4]

References

  1. ↑ Development of a Color Quality Scale from NIST
  2. ↑ Davis, W. and Ohno, Y. "Toward an improved color rendering metric". Proc. of SPIE 5941: 59411G––1.
  3. ↑ Pousset, N. Obein, G. & Razet, A. "Visual experiment on LED lighting quality with color quality scale colored samples". Proceedings of CIE 2010 : Lighting quality and energy efficiency, Vienna, Austria, 2010: 722–729.
  4. ↑ High CRI LED Lighting Supplier