The Hi-Tech Lamps part number F8T5/BL368-U is a 7.2 watt (7.2W), 57 volt (57V) UVA Blacklight Lamp made by Ushio. This lamp has a 15.5mm diameter and an overall length (excluding base pins) of 287mm with G5 miniature bi-pin bases. This UVA Blacklight Lamp has an average life of 3000 hours. It has an initial UV output of 1.2 watts, with a spectral peak at 368 nanometers (368nm). This lamp is also known as Ushio F8T5BL, F8T5/BL and F8T5/UVA.