The ValuLine Ballasts are a great priced garden lighting ballasts. The cases are powder coated galvanized steel, vented to provide cool operation. They have a vibration dampening system for noise reduction. They are very quiet. All ValuLine lighting can be run at 120 or 240 volts. No rewiring is necessary. They will all run either M.H. or H.P.S. bulbs. They come with a 120 volt power cord.