Available in a wide range of sizes, these tubes fit into any of our standard Fluorescent fixtures. Emits 10% UVB rays essential for synthesis of vitamin D3 and proper calcium uptake in all basking herps. Additionally, these bulbs produce large amounts of UVA which have been proven to stimulate natural; feeding and breeding behavior in captive reptiles. Ideal for applications where ultra-violet illumination is desired without heat as a by-product.