My Ds is 10 and will be 11 yrs in September.
I still aim for 8pm to head up to bed, and have now extended lights out to 8.30pm. Last night its was 8pm light out as he was very tired after two late nights at his Dads over the weekend.
I reckon this is fine.] this bed time is alright.
He still wakes up at 6.30ish am