A review of colour rendering indices and their application to commercial light sources

  title={A review of colour rendering indices and their application to commercial light sources},
  author={Xin Guo and K Houser},
  journal={Lighting Research \& Technology},
  pages={183 - 197}
  • Xin Guo, K. Houser
  • Published 1 September 2004
  • Environmental Science
  • Lighting Research & Technology
,!The CIE colour rendering index (Ra) is the most widely used measure for quantifying and comparing the colour rendering performance of light sources. Despite its prominence Ra is not without limitations, including its reliance on reference standards and the inability to compare the Ra of sources with different correlated colour temperatures. Other colour rendering measures have been proposed including several based on colour preference, others based on absolute scales, and some that are… 

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