PowerPlant Coil Ballasts are made to our exacting standards. They will run cool and are able to run most lamps, either Metal Halide or High Pressure Sodium. Take care to match the lamp wattage to the Coil Ballast you select. All Power Plant Ballasts carry a 2 year warranty, they are sturdy and run quiet. The round earth input allows you to select most Australian and New Zealand reflectors, allowing you to choose the most suitable reflector style for your own custom garden environment.