I go to sleep about 3 am and wake up between 7-7:30. In the summer tho I wake up around 5 am every morning, despite having a dark room. Seems like enough sleep for me tho, I've never slept the recommended 7-8 hours. Seems to function fine on four hours. But when I'm getting less than that it does trigger mania quickly, when I'm manic I might get 5 hours in a week, usually I will only sleep every 3 days or so.