8 hours

8 hours sleep is must

7-8 hours

younger children get somewhere between 9 and 11 hours of sleep each night. Teenagers usually need between 8 and 10 hours of sleep nightly. This is obviously more than the 7 to 9 hours most adults sleep each night. Most adults need 7 to 9 hours, although some people may need as few as 6 hours or as many as 10 hours of sleep each day. Older adults (ages 65 and older) need 7-8 hours of sleep each day.

7to 8 hours