I have bipolar 1 and strangely enough, I'm always able to sleep, even during manic episodes. I normally sleep at least 9 hours a night, so getting only 4-5 with frequent awakenings (and no fatigue) is a big change for me and never leads to anything good. Fortunately I'm on a number of different meds that make me sleep, so I don't have those ridiculous highs anymore.