1Wide application: This black ceramic heat emitter bulb is the perfect 24 hour heat source for all reptiles. 2Operational Principle: Heating source: Ceramic, infrared, electrical, no light emitted. Solid ceramics element has a good heat radiation feature. 3Advantage: It will also increase the ambient air temperature in the terrarium. Infrared heat penetrates the scales and skin tissue, promoting health and healing as it widens the blood vessels and increases blood circulation. 4Long life: High thermal efficiency, and life expectancy up to 20,000 hours. 5Material: The bulb is made from high temperature clay + environmental protection glaze, which simulates the moon's natural glow for nocturnal viewing without disturbing the reptile's day/night cycle.