I would say the time when they are tired but try and encourage 8:00
I think that a normal bed time for an 11 year old is 9:30 or 10:00
7:00
8.30
Between 9-10pm.
8pm
8:30PM
9pm-10pm
10:00 p.m.
about 7:15
8:30 or 9 PM
8:30 or 9:00pm
when her parents/guardians tell her to