is it safe to leave christmas lights on

Good question! It's always best to turn off your Christmas lights when you're not home or before going to sleep at night. This is important for both safety and energy efficiency reasons. Unattended lights could pose a fire hazard, especially if they are near flammable materials. Plus, keeping lights on unnecessarily could also drive up your energy bill unnecessarily. So, turn off your lights when you're not there to enjoy them!