To me it sounds like a really bad idea! Having a normal sleepcycle is essential in managing the ups and downs. Also work in healthcare during the summer and did both morning, evening and night shifts, in no specific order. It really messed up my sleep, I think that is why I am experiencing more highs and lows now than I did in like four years. I think especially for bipolar people it is important to keep the circadian rythm intact, since we are so extremely sensitive to disruption.