How many hours do you need for sleeping? I need 5-6 hours a day to sleep. When I can't sleep at least 3-4 hours, on the next day I'm acting like a robot who doesn't think and feel anything and my calls are generally busy. If I can sleep for 4 hours on call , I am lucky . Unfotunately we aren't allowed to go home after the call , so I'am working for 36 hours like most of you.