Zoo Med Heat UVB Reptisun Basking Spot Lamp 100 watts comes with a Reptisun 5.0 UVB compact fluorescent and Basking Spot Lamp. Best used with Reptile Terrariums and Zoo Med's Reptile Lamp Stand for maximum safety. The Reptisun 5.0 UVB compact fluorescent helps to prevent metabolic bone disease commonly seen in captive reptiles at 6-12 months of age. Provides UVB for vitamin D production and calcium metabolism. Lamp emits UVA which is seen by reptiles and helps to increase activity levels, appetite, and reproductive behaviors. Comes with Reptisun 5.0 UVB compact fluorescent and Basking Spot Lamp Self-ballasted Compact Fluorescent UVB Lamp for reptiles and amphibians. Basking Spot Lamp uses a patented computer designed double reflector that focuses 35% more light/heat in the beam than other reflector bulbs. Helps to prevent Metabolic Bone Disease commonly seen in captive reptiles at 6-12 months of age. Provides UVB for vitamin D production and calcium metabolism. Reptisun UVB emits UVA which is seen by reptiles and helps to increase activity levels, appetite, and reproductive behaviors.