I know the TLC5940 can only do 120ma per channel 16 which is 5 RGBs but I'd have to mosfet p (I believe) do regulate current before entering the TLC, does this sound right? It would be more feasible to just do 5 RGBs(3w) per fixture and therefore only needing single TLC per fixture, however, wouldn't I need a mosfet per color so in this case 15 of them?
I suppose you must run these 4pin 3w RGB in parallel? or could it done in series?
What need to find is several circuits used with high voltage/current LED drivers..etc