Between 5 and 6 hours mostly, with the occasional longer sleep of maybe 7 hours. That's fine for me. I'm good on that.
I'm 57 now and finding that I need less sleep as time goes by. To be honest, I've rarely been a full 8 hours a night person even as a child/teenager. It just never happened that way for me and I was fine.
We are all different, and I think that sometimes people do get very hung up on the notion that absolutely every adult needs 8 hours per night and children 10 - 12 hours. Yes, children do need more than adults as they are growing etc. It varies though a lot more than people think it does.