Impact EHC Lamp (500W, 120V) Tweet Description The Impact EHC Lamp (500W, 120V) is a clear, ceramic bi-pin base 500W, 120V bulb for photographic, stage and studio fixtures. Details Additional Category Tags: Lighting Lamps & Flashtubes, Tungsten & Halogen Lamps Category: Lighting & Studio Manufacturer Catalog Number: EHC Product Manufacturer: Impact Subcategory: Bulbs & Lamps