400 Watt - Metal Halide Ballasts
Metal Halide Ballasts - Magnetic - 400 Watt
All metal halide lamps require a ballast to deliver the initial voltage while starting the lamp. Additionally, the ballast regulates the flow of electricity and supplies the appropriate amount of voltage to the lamp. Whether you need a 4-tap, 5-tap, or f-can ballast, you'll find the 400-Watt magnetic ballast you're looking for at 1000Bulbs.com. Don't see what you need? Contact us at 1-800-624-4488 to speak to one of our lighting experts.