I put my UTH under my roach bin. The bin is just a plastic, gray Rubbermaid tub. I'm not sure of the wattage on the UTH, as someone gave it to me. (He used to have a ball python.) But it is a smaller one; I think it's Zoo Med's small UTH, around 6" x 8". I keep it on the left underside of the bin, where I keep the egg crates. (I put food on the other side.) The UTH is in-between the bin and the floor, so maybe I should put a rack under it like Cooper does. It stays plugged in at all times. I don't have a thermometer inside the tub to actually measure the heat, but they pretty much stay on that side of the tub, and I have ton of babies right now, so it must be working!