The Reptile Systems Ceramic Heat Emmitters ideal for creating necessary constant warm areas in the terrarium. Supports digestion, promotes well-being and activity and enables night observation of the animals without disrupting the 24 hour cycle. Only use Heat Emitter in a suitable Ceramic Lamp Holder such as the Reptile Systems Black Lamp Holder. Can be combination with a suitable thermostat in order to regulate the heat. Made in a classic black to easily blend in to the habitat of your reptile enclosure.