The Exo Terra Repti-Glo UVB100 Compact Fluorescent Tropical Terrarium Lamp Bulb is a compact fluorescent bulb that emits optimal levels of UVB for reptiles with moderate UV needs. Ideal for tropical and subtropical species, it helps prevent metabolic bone disease by promoting calcium absorption. Ranged from 13 to 26-watt options this lamp fits standard screw fixtures and should be used in a fixture with reflective hood for best results. It provides UVA as well, enhancing your reptile’s appetite and activity while supporting overall health. Available in Multiple Wattage options