Product Info Catalog Electrical & Lighting Lamp & Fixture Parts Lamp Parts 660-Watt 600-Volt Fluorescent Lampholder 660-Watt 600-Volt Fluorescent Lampholder Request a Quote UPC: 785007863086 Manufacturer: Pass & Seymour SKU: 189563 Model Number: 3901WCC20 660W, 600V, White, Fluorescent Lampholder, Medium Bi-Pin, Screw Terminals, Bulk.