gonelifting....
.... maybe you might want to look into meditation? I don't do it myself, but I've read that 2 hours of proper meditation is the equivalent of 8 hours sleep.... I don't know how much that claim can be trusted, and I don't know what they mean by "equivalent".... but it might be worth researching.
I get 8-10 hours a night, and sometimes an hour or so nap in the afternoon when I can.
I read something last year where the American Medical Association concluded that adults only need 7 hours.... not 8 hours, as was previously prescribed. In my opinion, it's just a ploy so they can increase the length of the working day.
And while it would be nice to sleep until I woke up naturally, that really varies from day to day.... I'd have to go to sleep at 4:00 in the afternoon to ensure I was awake in time for work the next day.