Philips Advance 71A6091-001D Core & Coil Ballast Kit is a magnetic HID ballast replacement designed for 400 W fixtures, supporting 120/208/240/277 V input. Consisting of a core‑and‑coil assembly with an attached ballast capacitor, it provides the ballast function for HID lamps in compatible luminaires. It is part of the 71A Core & Coil family from Philips Advance and is intended as a direct replacement in metal‑halide HID fixtures that require a 400 W core‑and‑coil ballast kit. Typical use cases include 400 W metal‑halide lighting installations where a robust, stackable ballast solution is installed in industrial or commercial environments.
