said by shdesigns:Just paint the joists and subfloor gloss white and you should be fine.
Mine has been there for 15 years. The paint has yellowed due to the UV from the bulbs. It was cheap latex, I think a glossy oil-based white would do better.
Good idea, if I use a diffuser lens, you wouldn't see the painted joists, just washed white.
Though I'd still put a back board over the subfloor, not just because I want to bring the bulb closer to the bottom of the joist, but because the subfloor has a ton of nails sticking out from it and I'd like some sound insulation
As for your yellowing paint, why not buy a can of spray paint and refresh it a little bit?