Use this dialog box to modify the lamp color for a photometric light.
Select this radio button if you want to select the lamp color from a fixed list of standard colors (spectra).
Select this radio button if you want to specify the color in Kelvin temperature. The color corresponds to the glow of an ideal blackbody at that temperature. Enter the desired value into the provided field (between 1000 - 20000).
Shows the result of modifying the lamp color.