Reptiles are much like humans in that their bodies need specific exposure to ultraviolet B light in order to make vitamin D3.If a reptile does not have access to UVB,it will not produce this key nutrient,which leads to serious health issues like metabolic bone disease and calcium deficiency.This UVB wavelength lamp has been designed to provide the proper spectrum of UVB radiation needed by reptile species. It allows reptiles the ability to regulate their own Vitamin D3 levels naturally,enabling them to properly absorb calcium which is needed to maintain healthy bones,muscles,and immune system.With this UVB Lamp,you can ensure your pet has proper levels of exposure to UVA and UVB light so that it stays healthy.