... ballast2, High luminescence efficiency3, High Power Factor, Low THD4, Wide operating voltage range5, Quakeproof, Anti-jamming6, Energy-saving up ... short circuit protection and overload protection8, Ignition failure protection, low voltage protection9, Constant performance, prolong the lamp life-span10, ... HPS-250W250W1.18A≥0.995≤6%166×93×551200gXLDS-HPS-400W400W1.91A≥0.995≤6%186×103×591450g Production & ...