It is difficult to adjust the relative spectral sensitivity
S
(λ) of photo-detector to exactly match to the CIE standard photometric observer-the spestral luminous efficacy
V
(λ) due to the difference of relativ spectroal rdistributians among the different phosphors
therefore
it is needed to carry out the color-correction in the measurements both for the relative brightness of phosphors and other photometricquantities.In this work
we calculated color-correction coefficient of relative brightness of some phosphors.