Calculate Illuminant D SPD and CIE 1931 xy from color temperature
Color temperature to Illuminant D SPD and CIE 1931 xy
XY Coordinates: (0.38044,0.38284)
Formula used to convert CCT to Illuminant D spectral power distribution
First, lookup the xy coordinates from CCT to reconstructed daylight.
Then, use the xy result and the following formulas for M1 and M2:
M1 = (-1.3515-1.7703*x+5.9114*y)/(0.0241+0.2562*x-0.7341*y)
Then, for each wavelength, use the following formula to get the irradiance value:
S = S0 + S1*M1 + S2*M2
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