And then there'll be a street light that's bound to shine in or maybe the neighbor's floodlights will flicker through. Or am I the only one that has that kind of luck?
I can't fall asleep unless my room is pitch-black and the only thing that worked for me was a combination of blackout film and blinds. The window film is easy to affix. You essentially just peel and stick it. It doesn't require adhesive or anything. It was inexpensive and I've had it up for years. However, I will say that my window isn't exposed to precipitation since the carport roof is over it, so that could be why it has lasted so long. But like I said, it's inexpensive and I wouldn't mind replacing it. My room is dark as can be.