What Is CRI, CCT Of The LED Light?

Colour Rendering Index(CRI):

A measure of the degree of colour shift objects undergoes when illuminated by the light source as compared with those same objects when illuminated by a reference source of comparable colour temperature. Normally standard has CRI70 CRI80 CRI90 etc.

 

Colour temperature:

The description is used to describe the effect of heating an object until it glows incandescently. The emitted radiation, and apparent colour, change proportional to the temperature; easily envisioned when considering hot metal in a forge that glows red, then orange, and then white as the temperature increases.