This high intensity grow light with built-in digital ballast. Automatically converts from sodium to halide. Virtually silent operation and energy efficient. Air-cooling options available, low profile, light weight. Completely pre-wired. Includes instructions, hangers and lighting recommendations. 120-Voltage, maximum wattage 250. 5 Year warranty. This product weighs 19.5-pound. Measures 20-1/8-inch length by 13-inch width by 7-inch height.