The Arcadia Reptile Solar Basking Infrared heat lamp is a wide beam flood red glass E27 map that has been designed to heat a vivarium with little visible light. We recommend that you use natural slate under the heat source as this will store the heat in a natural way during the day and then release this energy back during the evening. This will aid stabilisation of enclosure temperatures, not only during the day, but overnight when required. The Arcadia Reptile SolarBasking InfraRed range of heat lamps are available in 50, 75, 100 and 150 watts.