hey rubber... I don't grow under lights, but I do bring in my peppers in pots n overwinter them in my greenhouse room... I cut em back, n by mid june we r getting peppers, while everyone else in 6+ weeks behind...
we do start new pepper seeds under fluor's n once they sprout which sometimes is weeks, they do really well, but for flowering I would think u need a lot more light then they will put out..
I have some Caribbean Reds starts growing under flouros. They seem to be thriving. I started them as a germ test and am just letting them go, need to transplant tho. The problem I’m going to have is space, can’t really put them out till May. Might have to do some pruning and/or put them in a window sill down the road.
If you bring plants in to overwinter make sure you look out for and treat for pests. Peppers don’t get a lot but I had some years ago that got infested with aphids big time (no natural predators).
buildasoil had some videos on instagram of them growing peppers in a 4x4 tent (and all other things) under just one of those big 150w cfl.. never tried it myself, but apparently they arent too light intensive