The Ushio USH-200DP is a 200 watt Mercury Short Arc lamp with 10000 lumens visible light output. Typical lifetime is 1000 hours. This lamp has two M4 bases on the 16mm diameter x 128mm long clear double-ended bulb. This item is made by Ushio, and is also commonly available from Osram/Sylvania. It is seen as alternative part numbers 5000276, USH200DP, 69223, HBO200W/2-TML2, HBO200W2TML2, HBO-200W/2TM, HBO200TML2, HBO200TM 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.