The XBO 2000 W/H XL OFR is a 2000 watt, ozone free quartz Xenon Short Arc Lamp with 80000 lumens visible light output. Typical lifetime is 3500 hours. This lamp has SFaX27-10 (anode) and SFa27-14 (cathode) basing on the 52mm diameter x 370mm long clear double ended bulb. This item is made by Osram, and is commonly available from no other source but Osram/Sylvania, but as alternative part numbers 69477, XBO2000W/HXL and other variations. Product Warning: Xenon Short Arc lamps emit harmful ULTRAVIOLET RADIATION, are under HIGH PRESSURE, require a HIGH VOLTAGE ignition, and can GENERATE OZONE (unless designated "OFR".) These lamps get VERY HOT during operation, and remain hot after operation for a significant time. Avoid direct or reflected exposure as this can cause serious skin burns and eye injury. This lamp should only be operated in properly designed and maintained equipment. Proper protective gear should be worn at any time the lamps are to be handled.