Thanks - I do open the curtains in her room as soon as I get up in the morning. Unfortunately, this seems to have no effect. I still have to wake her up even with the sun pouring in for over an hour.
There was one day this week when she went to sleep a lot faster - it was after a full day of musical theatre camp, a play date with her friend, an art class, and an hours swim in the pool. If we could do that level of activity every day I think we'd be better off. Unfortunately she is by nature more sedentary - most days, it is hard to get her out of the house doing some physical activity.
We do try to keep the lights dim and have no screen time for an hour before she goes to bed. However it's not always consistent and something we can try to be better at.