Bring a ray of desert sunshine to arid reptile habitats. When it comes to the bone health of a desert reptile, the extra daily dose of UVB light provided by a Desert 50 bulb (50 microwatts per second/cm2) is as essential as proper food and water for long term strength. The Desert 50 family of bulbs also provide needed UVA light, plus visible-spectrum illumination that makes skin coloration more vivid and viewable. Get all this in a family of high-efficiency bulbs designed to fit most major fluorescent fixture types (compact, T5 and T8). Incandescent lamp users also have the option of a Coil Bulb that screws into a standard light socket. Desert 50 bulbs are designed for 3500 hours or twelve full months of average use. Ideal for Desert Dwelling Reptiles: Bearded Dragons, Uromastyx, Frilled Dragons, Horned Lizards, Collared Lizards, Chuckwallas, Sulcata Tortoises, Leopard Tortoises, Russian Tortoises, Savannah Monitors and Nile Monitors. Delivers UVB light levels essential for desert reptile health. Full-spectrum illumination accents subtle pet colors. Styles to fit fluorescent, incandescent light fixtures.