*Then in the lamp-house action spectrum have a little or absence object below benchmark lamp-house shooting main-wave,will be let color bring obvious color shift. color difference grade more bigger,lamp-house vs the color display color rate be more bad.Deduce color exponential coefficient still is at present define lamp-house display color rate appraise usual means.

*Incandescent lampe's color temperature exponential define is100, treat perfect benchmark lamp-house.The system as 8 kinds color grade midding normative color model to check,below the comparative test lamp-house and below the same color temperature's benchmark lamp-house.The 8 colors deviation grade, as the measure the lamp-house's display color enponential, adopt average deviation rate 20-100,as the 100 be the highest, average color more bigger, rate value more lower, under the 20 lamp-house usually unsuitable ecumencial using.