Last night was 7 hours. I usually sleep 6 to 7 hours. And i usually wake up every 2 hours or so since i had a heart attack years ago. At first my doctor prescribed Ambien to help me sleep through that night, but that left me feeling groggy and goofy in the morning so i nixed that. Now he's prescribed marijuana. I still wake up every couple hours but it's easier to fall back asleep if I have a toke or two before bedtime and there's no after effect in the morning.
I woke up in the middle of a heart attack and I think that's why I wake up so much when I sleep—subconsciously scared I'll have another one.
I don't have a television in the bedroom and often go to bed with jazz playing timed to go off after 30 minutes.
I was a toker before it was prescribed, but never at bedtime (I saw that as a waste) until I got a prescription for it to help me sleep.