The Repta Cera Heat are an economical and enviromentally friendly way of heating your pet reptile. They don't give off any light, so are a great source for diurnal Reptiles preventing disruption to normal night time sleeping patterns. These Ceramic Heat Emitters must be mounted inside a mesh cover to prevent the accidental contact between the bulb and your Pet Reptile or yourself. The surface of these bulbs can exceed 200oC.