UVB and UVA 2-in-1 Light Bulb 125W (Multiple UBV Outputs) For Bearded Dragons And Reptiles Self Ballasted Screws into a standard clamp lamp fixture. This bulb emits both UVA and UVB radiation reptiles need to stay healthy. UVB produces Vitamin D with in the reptiles skin needed for calcium metabolism. Helps appetite, activity, beautiful colors, and allows calcium absorption through vitamin D3 production. Also needed to prevent metabolic bone disease. Works for turtles, bearded dragons, lizards, reptiles, birds, terrariums, and aviaries. 10,000 Hour Lifespan Produces Natural Sunlight Benefits and Heat for your Reptile