Ah I see, Thanks for the info!

Yea, I'm thinking I will need to purchase another uth and thermostat for the cool side then, because especially in the winter it gets quite cold in our house (saves money on heating costs )

I will start out doing the foil over the top as suggested and see if it holds the heat, if not then I'll get the second uth with a thermostat. The light really is a pain anyways.