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