Gurkengelee

I always go to bed at 10 pm and try to wake up at 5 am. Sometimes I wake up at 4 am, sometimes I sleep through to 6 am. So it's about 6 to 8 hours sleep per night. If I get less sleep I may be more productive for 1 or 2 days but then my body will get it's sleep the next night when I sleep up to 12 hours even with a clock set. Science has it that some people can do with very low amounts of sleep. If you are not one of them you probably need your average 7 to 8 hours per night. I recommend that you try out different sleep schedules for a month and see what suits you best.