Review on 🔥 2 Pack BOEESPAT Ceramic Heat Emitter Bulb - 60W/100W/150W, Reptile Heat Lamp for Brooder Coop Pet, Non-Light, No Harm, Ideal for Pets, Amphibians, Hamsters, Snakes, Birds, Poultry, Chicken Coop Habitats (White) by Lisa Ramirez

I have 60 watts to keep my chickens warm. They don't give off much heat, enough to keep them warm in a small enclosed space (without harming them if they come into contact with it) until it gets too cold. If you expect cool temperatures or draughts, higher performance may be required. Fits in a standard lamp socket, no temperature control (Amazon wanted this in the review) other than raising or lowering the light fixture. The heat with no light that she kept up all the time suited me fine