The Ushio UXM-S200MB is a 200W Mercury Short Arc lamp. This lamp has a typical life of 1000 hour. This item is made by Ushio, but has alternative part numbers UXM-S200KL, 5000584, and other variations. 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. Proper protective gear should be worn at any time the lamps are to be handled. Hg - LAMP CONTAINS MERCURY.