Colour rendering
a.
Colour Rendering Index, CRI > 80
This value represents an average value, which means that deviations in the individual colours (Ri) may exist for the same CRI. Depending on the visual task involved (colour recognition in textiles, office or control room work), the requirements placed on colour rendering are very different. If the CRI is not expected to satisfy any particular requirements, this can be used to benefit system efficiency, since lower CRI values go hand in hand with a higher light output.
