*Display color rate (Ra): in principle, the man-made ray and nature ray both is the same, use naked eye can adapt to distinguish case color lamp-house. For the object color show itself grade become display color rate, usually we call it is "display color rate".

*Color temperature: then the lamp-house shoot the light color, and "black body" temperature higher and higher, in the action spectrum analysis is be the more and more, and that red analysis will be less and less,for example:the incandescent lampe's light color is warm-white,the color temperature denotation is 2700K,and that light color fluorescence lampe's color temperature denotation measure is 6000K.

*Light color: in fact the Light color is the color temperature,large circumstance will be part three style: warm white≤3300K,mid-color 3300K-5300K, daylight color≥5300K,because the action spectrum in the ray have different pare be compose,so that even if the light color is the same,maybe the light display color is dissimilar.