... 250W, 400W, 600W, 1000W 1.120~240V / 50~60Hz 2. more efficient than magnetic ballasts Electronic ballast available 250W, 400W, 600W, 1000W Input ... , adjustable output power: 50%, 75%, 100%Higher lumen output and more efficient than magnetic ballasts Operates both Metal Halide and High Pressure Sodium ...