Experiment
I would consider doing a back box in LED's on a SS.
but I would leave the pf either as is or try Colored Incandescent Bulbs in the GI ,
I've seen that done to great effect
unsure if I'm correct but I think the coloured globes seem to not last as long which could be due to heat. I had a few reds, yellows, and blues. The blues go quicker than reds, and haven't had a yellow go?????