mooseontheloose
Moderator
I have a sink. What I dont have is free and clear access to the windows. They are blocked by 3 issues, plumbing, the ceiling cuts across them, and they are recessed.
Could you not black them out from the outside? Back in Canada when I was living in a basement apartment I had to block out several windows across multiple rooms. I used several very heavy duty garbage bags and taped them up on the outside of the house. It wasn't pretty, but it was easy to take down when I wasn't using the darkroom (aka my bedroom).