NextGen electronic ballasts will run up to 1000 watt bulbs. With flicker-free operation, fast lamp ignition and a constant lamp voltage, they are perfect for the next generation of gardening. They produce up to 30% more light than a standard core and coil ballast, while putting out much less heat. The NextGens are the smallest ballasts available and weigh just 6 lbs for the 1000w model. They can run at any voltage from 90v - 260v, making them very versatile.