Description Wide Application: This black ceramic heat emitting bulb is the perfect 24-hour heat source for all reptiles. Working principle: Heating source: ceramic, infrared, electric, no light emitted.Solid ceramic element has good heat radiation (also works in a sealed box). Benefit: This will also increase the ambient air temperature in the terrarium. Infrared heat penetrates the scales and skin tissue, promoting health and healing while widening blood vessels and increasing blood circulation. Long life: high thermal efficiency and life expectancy of up to 20,000 hours. Material: The bulb is made of high temperature clay and environmental protection glaze, which simulates the moons natural glow for nighttime viewing without disturbing the day/night cycle reptile. Size: 6CM