I am Bipolar type 1 and have had trouble with sleep in the past. Lithium and an antipsychotic(Seroquel) pretty much got me to sleeping a full 8-9 hours sleep again-that is REALLY important with Bipolar 1 or 2.
Trazodone and temazepam are also good sleep aids, one is an antidepressant and the other(temazepam) is an actual sleeping pill. Some of the mood stabilizers are very sedating, like Depakote.
Just my $0.02, Good Luck!!