Cool light provides maximum light output, is best for non color-critical
applications, and looks like "moonlight."
Neutral Light provides good light output, excellent color rendering and looks
Warm light provides less light output, excellent color rendering and looks more
Color temperature simplified.
Correlated Color Temperature (CCT) refers to the color appearance of a light
source, ranging from cool (blue) to warm (yellow). Essentially, CCT, measured by
the Kelvin scale, describes the way we perceive light.
Because the exact kelvin value of each LED can vary slightly from one to the
next, nominal CCT defines an allowable range of variation. These variations are
so slight that they are hardly noticeable to the human eye, which means that two
LEDs may have slightly different CCTs, while still being defines as having the
same Nominal CCT.
Perception is a powerful thing.
Color Rendering Index 9CR) measures a light source's ability to show colors
"realistically" compared to a standard reference source. LEDs with the maximum
CRI value of 100 would produce an extremely natural-looking environment.