I made my incubator last week. After almost a full week of trying to get my temp to be the same for more than a day at a time with a dimmer I decided to try the hot water heater thermostat. I have the exact same Therm and light kit as the one used here: https://www.backyardchickens.com/forum/viewtopic.php?id=8510 Do I have to put the bottom piece on the light kit? The one that MissPrissy has outside the box at the page above. Is it a bad idea not to have it? I don't want to burn my house down or anything.