Probably not… I’ve always heard people get 8 hours of sleep when it’s dark, but my whole life I’ve always had broken sleep that doesn’t return to sleep after waking back up, and after years of being unable to sleep consistently at some point I changed approach and just sleep whatever time I get tired. It slightly improved my physical and mental health at the time but my overall tiredness never really reduced, I just don’t stare at the ceiling waiting for sleep anymore. The times I get the longest sleep tend to be when the sun is up, which is a disaster for being on-call during daylight business hours.