Advertisement The best use of heatpads are to increase the RH of the tank. I use it for my Tityus stigmurus colony to keep the water cycling and it humid as they like it. I use 50-150w infrared bulbs to heat my specimen. Depends on the room. Back when I had them in a split level basement, the 100-150w were ideal due to the overall cooler temps. Now that I have them in an upstairs bedroom, they get the ambient heat they need already and 50-75 is ideal.