Bed Time for Children

What is the most ideal bed time for children? What time do you set as their bedtime? Please specify your opinion on the most appropriate time, by age, for children ages 0 through 17.

Please also explain the reason why you chose whatever time you did. And please explain how well, as a practical matter, the children are with adhering to their set bedtime and how you enforce the rules.

How hard do you find it keeping the children in bed once they went to bed?

And what time do the children (with age specified) wake up in the morning? How much trouble do you have getting them out of bed? Do they wake and get dressed on their own or do you shlep them out of bed?