If you're looking for a durable and reliable light bulb, you can't go wrong with a Westinghouse 250 W R40 Reflector/Heat Lamp Incandescent Bulb. This E26 (Medium) Red is sure to last for years to come. These reflectors with medium screw bases are perfect for use in brooder lamps. They are also compatible for use with standard household fixtures including bathroom heat lamps.
