The Exo Terra Repti Glo 5.0 has a moderate to high UVB output, similar to that of shady environments such as rain forests and other tropical locations. Reptiles living in these habitats receive less UV radiation because of the many climatological conditions (fairly high humidity, changes in weather, etc.) that prevent direct sunlight from reaching them or their basking sites. The advantage of the Exo Terra Repti Glo Compact Fluorescent bulb is its size and the fact that it is self-ballasted. A regular screw fitting is sufficient to operate these bulbs. The spiral shape of the bulb enables vertical or horizontal mounting without compromising performance. It is recommended to combine a high UVB output (Repti Glo 5.0 and 10.0) with a very high visual light output (Repti Glo 2.0) for optimal results. Fluorescent bulbs do not provide sufficient heat. A separate heat source is required in addition (ex: incandescent basking lamp).Over the years, Exo Terra has become the market leader in reptile products for the natural terrarium. This achievement was made possible by the philosophy of successful, continuous innovation, which has become a basic underlying commitment, a culture and an attitude. Exo Terra has designed and developed a wide range of reptile accessories, terrarium décor, and terrarium kits for a variety of reptiles and amphibian pets including bearded dragons, geckos, snakes, crested geckos, turtles, chameleons, leopard geckos, lizards, and frogs. Some of the reptile supplies include: heat lamps, heating pads, thermostats, humidifiers, misters, thermometers, water bowls, reptile foggers, lights, heat bulbs, reptile tank décor, fake plants, reptile vines, tank accessories, reptile décor, reptile substrate, reptile bedding, waterfalls, heat mats, lamps, reptile tweezers, hides and caves, reptile food, calcium, heaters, light fixtures, basking lights, reptile caves, feeding tongs, food dishes, reptile dripper, and reptile starter kits.