Phillips Advance LI571H5 Ballast Lamp Ignitor

The Philips Advance LI571-H5 (LI571H5) ballast lamp ignitor is a 1,000-watt high-pressure sodium (HPS) ignitor designed to pair with magnetic HID ballast systems to generate the ignition pulse that starts an HPS lamp. Specifically listed for use with 1000W HPS ballast configurations, it is a compact component whose listed dimensions are approximately 2-7/8 inches long and 2-5/32 inches in diameter. In operation, the ignitor delivers a high-energy spark to strike the arc in a 1,000W HID lamp, enabling reliable startup in core-and-coil ballast installations. The LI571-H5 is part of Philips Advance’s line of ballast accessories, commonly used as a replacement ignitor for compatible 1000W HID ballast assemblies in commercial and industrial lighting applications. Note that exact electrical ratings, mounting methods, and terminal configurations can vary by installation, so verify compatibility with your specific 1000W HID ballast before replacement.