... , and metal halide lamps 2.Characteristic: with high light efficiency,&long life HID Lamp:(Mercury Lamp, Sodium Lamp, Metal ... )Double-ended sodium lamp(70-150W,10000K)2.Characteristic:High lighting efficiency, low electrical wastage.Long life with golden light. Strong ... light efficiency, long life;Good light luster and colorful.3.Founction:Suit for the building foodlighting and contour lighting and ...