hps E-ballast 1.drop shipper offered 2.offering ESCROW buyer ... % power factor3.Soft starting- increase lamp life & reduce lumen depreciationoperate hps or mh lamps4.Anodized,extruded aluminum housing light weight,compact ... 220-240v and 110-120v 250w, 400w, 600w, 1000w 400 HPS E-ballasts for street lighting,hydroponic lighting,TUV,CE,UL ...