Electronic ballast available 250W, 400W, 600W, 1000W 1.120~240V / 50~60Hz 2. more efficient than magnetic ballasts Electronic ballast available 250W, 400W, 600W, 1000W Input: 120~240V / 50~60Hz, 2M ... .9% Built-in fan, disperse heat.Dimming, adjustable output power: 50%, 75%, 100%Higher lumen output and more efficient than magnetic ...