Yes on your thermostat , I have mine mounted about an inch from the bulb. Had a 30 watt at first, but it was letting it get to hot, so put in 75 watt. My concern is as the chicks get nearer to hatching, they generate some heat, and I have no way to turn it down . Tried an aluminum foil baffle to hold the heat near the thermostat , that worked, had a few degrees drop, but then it cooled to 92 before turning on. A challenge is always good. Keep posting your progress , interested how it works for you. My eggs should be here today, they better be here. I'll post pictures in a day or two.