UL-listed Mogul (E39) to Medium (E26/E27) Light Bulb Lamp Socket  Porcelain Adapter Converter Reducer Allows to convert a E26 light bulb in a E39 mogul base fixture UL-Listed Logo is printed at the surface of the product Solid Porcelain and Metal Can take up to 660 Watts and 250 Volts NOT A 3-WAY SOCKET, NOT FOR USE WITH 3-WAY BULBS.