The present invention relates to a unique color management method for calibrating and characterizing a light mixing system comprising a set of primary light modules emitting self-luminous color primaries, which may be intimately mixed to produce a batch color that matches a standard color. The radiant output of each self-luminous color primary, or channel, is modulated by a setting a light controller to a Digital-to-Analog-Conversion (“DAC”) value. In the event that the radiant output of the color primary channels is non-linearly proportioned to the DAC input values, it is useful to employ an innovative “iterative best-fit” method of simultaneously calculating admixtures of light from all color primaries that match a standard color. Otherwise, a matrix method based on matrix algebra may also be used to create a batch color that matches a standard color. A best fit tristimulus value method or best fit minimum RMSD can be used in conjunction with these spectral color matching methods. In addition, an optical feedback method may be used to correct systematic drift of the individual color primary channels.