I never sleep more than 2-3 hours at a stretch. Day or night. I have pets that like to eat once during the night and I guess I'm "programmed" to get up for that. It doesn't seem to bother me. I can nap during the day if I feel I need more sleep. I've never needed alot of sleep, though. I've always done well with about 5 hours of sleep total......meaning it's not consistent hours!