For example, tungsten/incandescent, “cool white” fluorescent, etc. sources have fairly well known spectral energy distributions which can be used to calculate the chromaticity coordinates of {HEAD ~ the ambient} which is adding to {TAIL ~ the light} emitted from the display 
is adding to
For example , tungsten / incandescent , “ cool white ” fluorescent , etc . sources have fairly well known spectral energy distributions which can be used to calculate the chromaticity coordinates of { HEAD ~ the ambient } which is adding to { TAIL ~ the light } emitted from the display
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH