The Holophane 400W HPS 480V S51 Lamp LBF2-5024 Ballast Assembly MB4C400HP48 is a high-quality electrical equipment designed for industrial use. With the trusted brand of HoloPhane, this ballast assembly ensures a reliable and efficient performance of the 400W high-pressure sodium lamp. The 480V power source allows for optimal functionality, making it a practical and durable option for businesses requiring consistent and strong lighting solutions.