The Osram HBO 103 W/2 / HBO103W/2 is a 300 hour rated 100 watt Mercury Short Arc lamp. This lamp has SFa7.5-2 (anode) and SFa9-2 (cathode) basing on the 10mm diameter x 90mm long clear double-ended bulb. This item is made by Osram, and is also commonly available from Ushio. It is seen as alternative part numbers 69182, HBO103W/2, HBO103W2, HBO-103W/2, HBO103W, HBO103 and other variations. Mercury Lamp Product Warning: Mercury 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.