... MOQ,Work quiet Product nameHPS/MH Electronic 600W Ballast with switch XLDS Characteristics1, Size: 260*103*59 mm2, Weight ... protection6,Constant output power, prolong the lamp life-span7, Light weight, small size, easy establish, absolute quiet, 3 ... Horticulture and Hydroponics Marketplace, Public Plaza, Theater Highway Tunnel Street Lamps, Public Lighting HPS/MH Electronic 600W Ballast with switch