The EYE 57787 allows you to convert from 250-watt mercury vapor to metal halide. Clean Ace metal halide lamps upgrade a mercury lighting system to the appearance of natural sunlight at 6500K with just a simple change of a lamp. At 18,000 lumens, the light output is 1.5 times brighter than a mercury lamp. Operates with mercury reactor Ballasts for ANSI H37 lamps. Enclosed fixture applications include: retail, painting/printing, aquariums, sports and manufacturing. EYE Clean Ace lamps provide a direct replacement for mercury vapor lamps without expensive ballast or fixture change.