Welcome to ColorRendering

Is it true that EVERY kind of light sources can vividly render 
the SAME number of colors ?

If not, then

WHAT kind of light sources can render the greatest number of colors and
make a colored scene look the most colorful ?
HOW many colors on earth can be rendered by a given kind of light sources?

Such questions highlight a particular aspect of the color rendering quality of
light, an aspect relating to the concern of whether a given light source is
capable of rendering a great number of widely different colors.

One answer to the above questions can be found in

the Color Rendering Capacity !