The XBO 1600 W/HS CL OFR is a 1550 watt, ozone free quartz Xenon High Pressure Cinema Film Projection Lamp with 70000 lumens visible light output. Typical lifetime is 2000 hours. This lamp has SFa27-11 (anode) and SFcX27-8 (cathode) basing on the 46mm diameter x 235mm 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 69354, XBO1600W/HS CL, XBO1600W/HSCLOFR, XBO1600W/HS CL-OFR 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.