I think that's normal. I've never used a brooder plate but I have an infrared heater for my ducks (it's specifically made for poultry) and it's designed to get up to 160-180F on the lens. I can touch it with my hands and it isn't bad.The brooder plate surface temp reads 138 with my heat gunI’ve checked it multiple times, I have it set up correctly. Surface beneath the brooder plate reads 91 and the chicks themselves read 95-97. The cool end outside of the brooder is 70.