Thanks mrb, that's pretty much what I gathered from my research. Nobody had good ideas on how to construct them. I need light now, so I'm putting in a couple of strips to get by.
Any tips on how you would build those boxes?
My thought was screwing the long sides of the box to the joists and...
Did you every get a response to this? I was looking to do the same thing and ended up bailing, because it looked like I would have to build boxes for my troffers due to the living space above.