CRI Color Rendering Index...What does it mean?
What is the Color Rendering Index (CRI)?
The color rendering index (CRI) (sometimes called color rendition index), is a quantitative measure of the ability of a light source to reproduce the colors of various objects faithfully in comparison with an ideal or natural light source.
100 is natural daylight, so the higher the CRI index, the closer the light source is to natural light.
Most 400 watt Metal Halide fixtures have a CRI of between 20 and 60.
Everlast Lighting manufactures The BlueMax bulbs which have a CRI rating of 93+ making it one of the closest light sources to natural light.