... ,Work quiet Product name HPS/MH Electronic 600W Ballast with switch XLDS Characteristics1, Size: 260*103*59 mm2, Weight: 1.8 ... , Open circuit protection, short circuit protection and overload protection,Ignition failure protection, low voltage protection6,Constant output power, prolong the lamp ... Street Lamps, Public Lighting HPS/MH Electronic 600W Ballast with switch