The Venture 59441 allows you to convert from 400-watt high pressure sodium (HPS) to metal halide. Metal halide lamps upgrade a HPS lighting fixture with just a simple change of a lamp. At 41,000 lumens, the light output has an excellent color rendering index of 65. This conversation lamp operates with HPS Ballasts for ANSI S51/E lamps. Enclosed fixture applications include: retail, painting/printing, aquariums, sports and manufacturing. EYE Clean Ace lamps provide a direct replacement for HPS lamps without expensive ballast or fixture change.