Flukers Ceramic Heat Emitter produces no light while radiating intense direct heat, providing an ideal 24-hour heat source for both tropical and desert reptiles. This is an excellent solution for establishing the correct environmental temperature range (ETR) for your reptile or amphibian. Radiates intense infrared heat, but no lightIdeal 24-hour heat source for tropical and desert reptilesLasts up to 25,000 hoursThe Ceramic Heat Emitter allows your pet to get the heat it needs, without a bright, blinding light causing harmful stress. Radiant heat is critical for providing reptiles with a healthy habitat. If a reptile is not provided with appropriate ETR, it cannot regulate its core body temperature and may be more prone to chronic infections. Ideal ETR varies from species to species; consult your pet professional for lighting recommendations for your pet. Directions: Screw Heat Emitter into Flukers Repta-Lamp. Clamp lamp at one end of the enclosure (basking area) and plug in. DO NOT place Heat Emitter over glass or plexiglass. DO NOT allow reptiles to contact the heat emitter. Turn the emitter on and allow to heat for 30 minutes. Measure the floor temperature of the enclosure under the heat emitter to determine that it is appropriate for your pet. Note: Some reptiles require a nighttime temperature drop to induce normal breeding behavior. A standard light timer can be used to turn off the Heat Emitter in the evening and back on again in the morning to create a more natural environment.