Depends on if there's a HOCKEY game on that night. And the wife is watching her programs. Sometimes I don't get to start the game until 10PM.
But, however many hours I get, I always seem to need more. Given no chickens to feed at sunup, or dogs to care for, paycheck to earn, etc etc I'd sleep until I woke naturally. Which, given my experience would be 8-10 hours. Doesn't happen much in today's world.
So, I'm going to take a nap now to catch up.
Because I can.