A light source. This type describes an interface and is not intended to be instantiated directly. Together,
intensityproduce a high-dynamic-range light color.
intensitycan also be used individually to dim or brighten the light without changing the hue.
color : Color
The color of the light.
intensity : number
The intensity controls the strength of the light.
intensityhas a minimum value of 0.0 and no maximum value.