Generic Ushio XBO75W/2: The Ushio XBO 75 W/2 is a 75 watt, ozone generating quartz Xenon Short Arc Lamp. Typical lifetime is 400 hours. This lamp has SFa7.5-2 (anode) and SFa7.5-2 (cathode) basing on the 10mm diameter x 90mm long clear double ended bulb. This item is made by Ushio and has alternative part numbers by Osram of 69231, XBO75W/2, XBO75W/2, XBO75W/2, Olympus 8-B198, Nikon 78682, Zeiss 380079-9190 and other variations.