The Hi-Tech Lamps part number G40T10E-U is a 39.5 watt (39.5W), 106 volt (106V) UVB Blacklight Lamp made by Ushio. This lamp has a 32.5mm diameter and an overall length (excluding base pins) of 1198mm with G13 bi-pin bases. This UVB Blacklight Lamp has an average life of 5000 hours. It has an initial UV output of 9.3 watts, with a spectral peak at 306 nanometers (306nm). This lamp is also known as Ushio G40T10E, F40T10/UVB and 3000320.