A. Wide Application: This black ceramic heat emitting bulb can be a 24-hour heat source for all reptiles. B. Working principle: Heating source: ceramic, infrared, electric, no light emitted. Solid ceramic element has good heat radiation (also works in a sealed box). C. Benefit: This may 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. D. Long life: It has high thermal efficiency and a life expectancy of up to 20,000 hours. E. Material: The bulb is made of high temperature clay and environmental protection glaze, which can simulate the moon's natural glow for nighttime viewing without disturbing the day/night cycle of reptiles. F. Size: 6CM