... .Wide range of wattages:1000W. 3.HPS magnetic ballast HPS 1000W:1.Physical Description:Ballast is an iron-core inductor coil, the ... nature of the inductor coil whenthe current changes, caused by magnetic flux ... 175W,400W,600W,1000W.B. It specially for MH or HPS lamps.C. This inductance ballast is more durable and everlasting than electronic ...