ReptiCare Ceramic Heat Emitters 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. Perfect for high humidity terrariums. UL/cUL classified when used in conjunction with Zoo Meds Wire Cage Clamp Lamp (LF10).