UVB lights are one of the most important tools used to provide and ideal environment for your sun loving reptile. Most reptiles require UVB light to naturally provide vitamin D3 which helps them to process the calcium from their diets. Without it there is an increased chance that they will suffer from Metabolic Bone Disease. We carry the Arcadia line of UVB light bulbs which is world renowned as being the best of the best. We also carry Zoo Med Powersun mercury vapor bulbs as well as the complete line of flourescent and compact lights. And if you want to get serious about UVB we have the Solarmeter 6.2 which will allow you to monitor your UVB reptile bulbs performance and let you know when it's time to replace them.