Zoo Med's Ceramic Heat Emitter are the perfect 24-hour heat source for all reptiles. These porcelain heating devices screw into a standard porcelain incandescent socket, giving off intense muscle-penetrating infrared heat, while emitting no light. The flat-faced design is more efficient and longer lasting than conical designs which build up excess heat internally, ultimately carbonizing the element. Lasts up to 5 years and UL/cUL classified when used in conjunction with Zoo Meds Wire Cage Clamp Lamp.