8. Much less and I'm knackered the next day.
How many hours of sleep do you need? watch
View Poll Results: How many hours of sleep do you need to avoid feeling tired?4 Hours or less83.96%5 Hours146.93%6 Hours188.91%7 Hours2914.36%8 Hours6632.67%9 Hours3818.81%10 Hours or more2914.36%