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I would like to take the spectral power distribution of a light source (first and foremost different kind of flourescents, not black bodies) and calculate the kelvin temperature of the light emitted from the light source.

With the help of this page I can map the spectral distribution to a point in CIE XYZ-space:

http://www.fourmilab.ch/documents/specrend/

But how do I get from the point in CIE space to a CCT value (Correlated Color Temperature)?

Best Regards

Daniel Larsson

http://www.defblog.se