Eight to ten hours of sleep per night.
they need about 6 hours of sleep
they need 15-20 hours of sleep
about 10 hours of sleep
it need 7hours sleep for health
they're human aren't they? so wouldn't the answer be how many hours of sleep does a human need? and the answer is about 8 hours.
You need 8 hours of sleep, and you have to be in deep sleep at 1-4 a.m.
6 Hours of sleep is enough
at least 9 or 10 hours to get enough sleep
about 8 to 10 hours of sleep
14 hours
Only 6 to 8 hours