This listing is for a NEW Universal Lighting Technologies S400MLTAC5M‑500 Magnetic High Pressure Sodium Ballast Replacement Kit. It is designed for operating 400W S‑51 HPS lamps and supports multi‑tap input at 120/208/240/277V. This unit is categorized as an HID lighting ballast kit and includes the ballast, capacitor, mounting brackets, wiring hardware, and installation components needed for replacement or retrofit applications.

This listing is for a NEW Advance 71A8473‑001D Core & Coil Ballast Kit. It is designed to operate 400 watt high pressure sodium (HPS) lamps using ANSI S51 / M169 specifications. This unit is categorized as a magnetic HID core and coil ballast kit and includes a pre‑wired ignitor, dry film capacitor, and mounting hardware, supporting 120/208/240/277V 60 Hz input for industrial and commercial lighting applications.