Typically 8-11 Hours.
10
You should never sleep with an eletric blanket.
If the pain of sleeping on it is tolerable then it should be ok to sleep on it.
Kids
5 hours a day
A fourteen year old should get nine hours of sleep each night.
8-10 hours.
for 8 Hrs
you should get on average 8 hours of sleep if you are a growing teenager.
at least 8 hours sleep every night
6 to 8 hours
Just tap the button once and it should enter sleep mode.