... .UL listed(American standard). 2.Wide range of wattages:400W. 3.HPS magnetic HPS 400W ballast:1.Physical Description:Ballast is an iron-core ... up to 1000W, like 100W,150W,175W,400W,600W,1000W.B. It specially for 400W HPS lamps.C. This inductance ballast is more ...