Colour rendering index
The colour rendering index (CRI) or colour rendition index, is the ability of light to reproduce the colours of the visible spectrum. The maximum value of the CRI is 100 by default corresponding to daylight.
For example, neon lamps with a CRI of 60 produce a wan light because they do not reproduce all colours well, unlike incandescent light bulbs, which have a CRI close to 100.
The light spectrum of an incandescent light bulb with a CRI close to 100. © Jason-Morrison CC by-nc 2.0
Colour rendering index - 1 Photo