The Hi-Tech Lamps part number G25T8-O is a 25 watt (25W) UVC germicidal lamp made by Osram. This lamp has maximum overall length of in. It is a T8 bulb with two G13 medium bi-pin bases. The average rated lifetime of this lamp is 8000 hours. This lamp is also known as Osram G25T8/OF and 23355.