Is OTHER wrong in the post ? POST : My roommate and I share a very small room.

He goes to bed at 10 pm more or less, while I use to study at night and usually go to bed around 3 am.

He has a very light sleep and wakes up whenever I enter the room, even if I do my best not to make any noise.

If I have to use my phone in bed, even with the lowest brightness and an additional filtering app that makes text hard to read even for me, he wakes up and can't sleep because of the light, as dim as it is.

Of course he complains daily.

AITA for not going to bed earlier?
Imho, obviously, I'm not.
He accepted to share the room with another person and he can't expect me to accommodate his rhythms.
I'd understand if I ever made loud noise voluntarily, or, in general, actions that are supposed to make him wake up.
But if he suffers this condition (which I think it is, because it's not normal) I can't just disappear or sleep on the sofa.