Yes, I would absolutly say something. And I'd keep the lights off.
You could let them know that you're struggling with the early drop offs in the am. And you'd appreciate it if they could keep to their origional time of 7am. Make a joke about every minute counting in the morning. And let them know that you will turn the light on when you're ready for them.
I hate my 7am drop off! They've been on a later schedule for a while, but it will go back to 7am and I am not looking forward to it. I couldn't take it if they were any earlier.