I do the same here. My advise would be to set the timers to come on later, like 10 oclock or so. This way the temps from the heat of the day has time to drop some on it's own, and running till 10 AM is OK cause it doesn't get hot that early. When I set mine for 7-7, the room is still hot in aftyernoon, and when the lights come on it gets hotter and it takes longer to cool down. It always works better for me that way.