dugdeep said:
Thanks for all the suggestions, guys! Last night I solved the problem. It seems I didn't have my screens in properly the night before, which is why there was light leaking in. There was a little tab I hadn't noticed that needed to be tucked in. Once I fixed them it was pitch black. Like Daniel S, I just need to deal with the light coming in around the door (which isn't an issue once my roommate goes to bed and turns out the light, but while she's up there's light coming in).
So the tinfoil on the windows does work then? Before I go out and buy a boatload, I'd like to know. :D
Unfortunately I've got a problem with the smoke alarm. It's wired into the house and can't be disconnected, and it has several "vents" that can't be covered up or it goes off. There is a blinking green light inside and if you cover up one spot, the blasted light shines out from the space between the plastic parts which goes all the way around it. If I cover the entire thing, it goes off. Grrrr.
I have a nice big walk-in closet that is totally dark. If only I could figure out a way to put a bed in there.