HID capacitors from Grainger can store electrical energy for ballast operation. Use them to replace or retrofit HID lighting. Oil-filled capacitors are required for higher-wattage applications and help reduce the chances of arcing when grounded inside the fixture. Dry-film capacitors can be used with most HID fixtures. Their thermoplastic case helps eliminate the need for grounding. Choose from a wide range of sizes, ratings, voltage levels and usages. Rely on Grainger for dependable HID capacitors.