Didn't work for me. I moved into an apartment with a sun roof. Made the bedroom super bright in the day and no way to cover the sun roof. I was worried I wouldn

Didn't work for me. I moved into an apartment with a sun roof. Made the bedroom super bright in the day and no way to cover the sun roof. I was worried I wouldn't be able to sleep because of the light but I was still able to stay up all night and sleep all day no problem. One of my best friends also has zero problems sleeping with the curtains open and sun streaming in.