Honeywell / H&P Hughey Phillips Obstruction Lighting - Varistor - MV24ZA4 : Varistor Metal Oxide - 24V - 4 Joules Genesis Lamp offers a wide selection of FAA obstruction lighting, tower obstruction lighting and aircraft/aviation obstruction lighting products.Honeywell / H&P Hughey Phillips Obstruction Lighting - Varistor - MV24ZA4