The Hi-Tech Lamps part number F30T8/BLB-U is a 30.5 watt (30.5W), 99 volt (99V) UVA Blacklight Blue Lamp made by Ushio. This lamp has a 25.5mm diameter and an overall length (excluding base pins) of 893mm with G13 bi-pin bases. This UVA Blacklight Blue Lamp has an average life of 4000 hours. It has an initial UV output of 6.3 watts, with a spectral peak at 368 nanometers (368nm). This lamp is also known as Ushio F30T8BLB, F30T8/BLB and 3000148.