Thanks for the honest answer, stick with me here because I'm an every little bit helps kind of thinker....
The spectral distribution has the potential to change, there are many combinations of various light colors (combinations of monochromatic light) that will result in the same color temperature.
Now the question... what is happening when additional current is applied? I believe it pulls up the peaks of the spectral distribution.
Why would this be relevant? .... The photons we are looking for reside on the slopes of this distribution and where they are will determine the degree to which they are increased. If we were lucky or good we would be able to selectively increase those wavelengths.