The Hi-Tech Lamps part number G4T5/HC-U is a 4.5 watt (4.5W), 29 volt (29V) Dual Band UVA/UVC Lamp made by Ushio. This lamp has a 15.5mm diameter and an overall length (excluding base pins) of 134.5mm with G5 miniature bi-pin bases. This Dual Band Lamp, UVA/UVC (254nm & 352nm) has an average life of 3000 hours. It has an initial UV output of 0.4 / 0.2 watts, with a spectral peak at 254 / 352 nanometers (254 / 352nm). This lamp is also known as Ushio G4T5/HC and 3000333.