I had a full supplemental bar system. Far red, UV-A+B, and a full spectrum... I removed all of them because it is really counterproductive. If your canopy needs underlighting, work on your canopy. That is where I left it. I use my full spec bar lights for a 4x4 veg for mothers now and the other bars as top lighting in a flowering tent. It is not worth the time, money, wiring, and so on IMO.
Like on those plants I'd take everything leaves and all off the bottom half of the plants. Then your canopy doesn't need underlighting.
If you are expecting a big benefit from them, then I got some bottled salts to sell ya . :D Just kidding, wattage in the grow room is wattage in the grow room, just better spent elsewhere IMO