Once I wake up 4-5 hours, it's hard to fall back asleep. I'm an extremely sensitive sleeper so the slighest amount of light hitting my face will wake me up. My window faces the sunrise so it pretty much wakes me up at the brake of dawn. Even when my sister opens the door when I'm asleep I will wake up quickly and instantly sit straight up mad because of the light. *lol* Maybe if I cover up my window with something thick to block out the light, I'll be able to stay asleep longer and easier.