Hmmm, thanks, I'll try the framing.

But I'm working with folding sliding closet doors, so there are outside cracks, a big middle opening, and two smaller ones inside each side of each door.

So I would love to find a way to attack each light leak individually.

And I would hate to have to tarp up the whole thing, as well, that doesn't seem to be plausible, seeing as nothing is really thick enough to stop the lights from even my fluorescent lights.