As I've gotten older, I've needed darker rooms to sleep in, but, unfortunately, my brain didn't get the memo that I should correspondingly be less afraid of the dark. Boo.
What I wound up doing is buying a ton of motion sensitive lights (surprisingly cheap on Amazon), and strategically setting them up. This way, the monster under the bed will trigger the light when he moves, alerting me to his presence! Also, I won't smack myself into the door frame when I try to walk to the bathroom in the dark.