True, but the engineering principal of K.I.S.S. is a very good one for a reason.
I see this as a basis for a full array lighting system. Of one of the following two options:
1. A large array of multiple small color LEDs arrays to get the desired wavelengths.
- or -
2. A large array of RGB LEDs with a current control circuit to modify the spectrum of the entire array at once.
I did want to ask if anything was done to the lenses of the LEDs to adjust for their generally narrow dispersion angle? It seems that the picture has a fairly even dispersion for just three LEDs.