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. Additional Information:Last up to 5 years Perfect for high humidity terrariums