Rite Farm Products 250 watt Infrared RED heat lamp light bulb. The red bulb is what we use and is perfect for baby chicks! -Lasts 20 percent longer than standard heat lamp bulbs uses standard 120 volt power standard type A (E27) screw in power base (same as your household bulbs) brass base to minimize corrosion and "freezing" in socket Shatterproof hardened Pyrex glass designed not to shatter if contacted by liquids average bulb life is 6000 hours