There is a lot of good information about sleep now, as a rule of thumb no screens for a half hour before bed. But I think the fact that you could sleep in a chair for five hours shows you body will demand it if it needs it regardless of you inclination.

My problem is I wake up at 5:30 am regardless of what I have to do that day. I am retired so I can have a nap if I need it. But sleep deprivation is the cause of a lot of illness though how much you need can vary.

https://www.dailymotion.com/video/x66hear a good show about sleep