Is practicing from 8:30-11:00pm good for the boys basketball?

The boys’ basketball team practices  from 8:30-11:00 P.M. on school nights. Practicing this late effects the kids in school because they do not get enough sleep at night. By the time the kids get home and finish showering and eating it is most likely midnight. These kids will get at most of 6 hours of sleep, which is not enough sleep to last a day in school. The boys should should find a better time to practice because 8:30-11:00 P.M. is not gonna cut it.   The kids are having a hard time in school and won’t be focused because they are tired from sleeping at 12pm.