Beneficial for Reptile Health---Infrared heat penetrates dander and tissues, promoting health and healing, dilating blood vessels and increasing circulation. This also increases the temperature of the surrounding air in the terrarium. No Light Emits - The lamp does not emit any visually detectable light that could disrupt your pets' sleep cycle. Working principle - Solid ceramic element has good heat radiation functionality and lasts up to 20,000 hours (also works in sealed boxes). Easy to Replace and Install --- This ceramic heat lamp is simple and easy to install. Simply screw them into a standard E27 porcelain screw socket (CAUTION: only use with porcelain socket as the plastic socket could melt the bulb holder). Wide Application --- This ceramic radiant heater is the ideal 24-hour heat source for reptiles and amphibians. Great for pet chicken coop, lizard, turtle, bird, snake, chameleon, bearded dragon. Product Description Color: 50w Specification: Condition: 100% Brand New The black color Material: Ceramic + Alloy < br> Size: (L) x (W) 7.5 x 10.5cm (Approx.) (Approx.) Power: 50W / 75W / 100W / 150W (Optional) Voltage: 220V Heat Source: Ceramic, Infrared, Electric, No Light Emits Package Included: 1 x Heat Emitting Bulb