I unscrewed carefully with pliers. Only wired for top lighting from what I can see. I only used a 15 watt bulb in the picture to photograph, so could go a good deal brighter. Do to the fragile nature of this lamp I will not accept a return. The item "GWTW Oil LAMP Red Puffy Satin Glass Hollyhock Pittsburg Success Electrified 1915" is in sale since Monday, May 3, 2021.This item is in the category "Collectibles\Lamps, Lighting\Lamps". The seller is "haywoodhouse" and is located in Waynesville, North Carolina. This item can be shipped to United States.