... sodium lamps, and metal halide lamps, with high light efficiency,&long life High Intensity Discharge Lamp:(Mercury Lamp, Sodium Lamp, Metal ... Reflected self-ballest Mercury lamp(GYZF100-1000)2.Characteristic:1)High efficiency, luminous maitain good rate;2)self-ballast mercury ... Double-ended sodium lamp(70-150W,10000K)2.Characteristic:High lighting efficiency, low electrical wastage.Long life with ...