The New and improved range of UVB linear tubes from Exo Terra replaces the popular Repti Glo range. The New High Output ET Reptile UVB 200 lamp range is a t8 linear tube designed for reptiles with a very high UV requirement or to cover a longer depth to reach the enclosures occupants. Combined with Exo Terra's new UVB lighting app the right lighting requirement is no longer an educated guess but can actually put the onus on the keeper allowing for better accuracy between keeper and retailer. All of the new ET lamps have been designed for maximum vitamin D3 photosynthesis by concentrating the UVB output near the 294nm wavelength (the wave length responsible for peak D3 production). The packaging includes all necessary informtion for shoppers to make the right choice. Includes, Full Spectral Graph, UV Spectral Graph, Reptile Bulb Rating System and distance related information like: UVB output - Photosynthesis - Ferguson Zones and Exo Terra Reptile UVB Chart.