OPERATIONAL PRINCIPLE: Heat source: Ceramic, infrared, electric, no light emitted. Solid ceramic element has good heat radiation characteristic (also works in sealed box) NO LIGHT EMITTED: Just emits heat without any light to disturb reptiles or others to sleep. This will also increase the ambient air temperature in the terrarium ADVANTAGES: Infrared heat penetrates the skin's scales and tissues, promoting health and healing as it widens blood vessels and increases blood circulation MATERIAL: The bulb is made from high-temperature clay and environmental protection glaze, which simulates the natural glow of the moon for night vision without disturbing the reptile's day/night cycle. < p>WIDE APPLICATION: This black ceramic heat emitter bulb is the ideal heat source for all reptiles for 24 hours. High thermal efficiency and lifespan of up to 20,000 hours This black ceramic radiant heater is the perfect 24-hour heat source for all reptiles. It will also increase the ambient air temperature in the terrarium. These porcelain heaters screw into a standard porcelain bulb socket and emit intense infrared heat that penetrates muscles while emitting no light. Infrared heat penetrates skin scales and tissues and promotes health and healing as it dilates blood vessels and increases blood circulation. The mini far infrared ceramic lamp is only 1/3 the size of ordinary ceramic lamp, and its volume is small. Solid ceramic element No light emitted More More effective Ceramic pet heating lamps are suitable for places where litter is small or ceramic lamps ordinary cannot fit. Delivered quantity: 1 piece Welcometomeet