Attributes . 0 - 800 Watt Ballast/0 - 600 Watt Tungsten at 120 Volt AC, 0 - 1200 Watt Ballast at 277 Volt AC, 0 - 1500 Watt Ballast at 347 Volt AC, 1/4 hp Motor Load at 120 Volt AC, 1/6 hp at 347 Volt AC . Names