... light efficiency,&long life HID Lamp:(Mercury Lamp, Sodium Lamp, Metal Halide Lamp) Mercury Lamp:1.Category:1) ... of square,station,dock,workplace and so on. Sodium Lamp:1.Category:1)Normal HPS:E/ED/ ... -Arc HPS;3)Reflected HPS;4)Double-ended sodium lamp(70-150W,10000K)2.Characteristic:High lighting ... road, airport, dock, station. And mineral workplace. Metal Halide Lamp:1.Category:1)color MH:Red,Blue, ...