I have a light and if its not on I'm not open so wait in your car..... I turn the light on at 6:45 every morning. If she want to drop off 15 mins early every day then tell her it will be an extra charge of $xxx and I'm sure she won't need an early drop off..... I would also charge a fee for the late pick up ... Post a note on your door advising all parents of the late fees and let them know all late fees are due at pick up in cash.