Talking about roommates leaving the lights on.

Don't pay attention to such selfish people, there are some things that others can or can't do. Like making a phone call or something. If he is studying, he must watch it at night. It's no use talking to him. He still needs to read at night. And he just reads, doesn't read aloud, and doesn't make a sound. You will only widen the gap between you. I suggest you buy a comfortable eye mask and earplugs. Not expensive. A dozen dollars is enough. He will naturally understand your tolerance and concession when he sees you wearing an eye patch and earplugs. You may have a friend who really appreciates you. If he is the kind of unreasonable person, you don't need to argue with him, which will only make you more upset and worry.