I sleep 6 -7 hours at morning then 1-3 hours at afternoon, not the same than doing the whole 12 hours in arow tho unless it's weekend, then yes, i can get to sleep properly.
Remember when you were young? You shone like the sun
When i was in highschool i was sleeping like 4-6 hours per night and maybe when i had free time 2-3 more hours in the day. Now at university i want to have at least 8 hours of sleep per night if possible.
2-4 hours a night when i was in college and 12 hours in the weekends, ever since i got a job it's a bit more balanced, usually 6 hours on weekdays and 10 hours in the weekend