ZITRADES(TM) 5PCS/Lot E26 E27, Edison Screw to GU10 Bayonet Base Adapter This handy adapter quickly and easily converts any standard GU10 lamp to an E26 Edison screw-in base. LIGHT BULB CONVERTER ADAPTER SOCKET E26 MEDIUM TO GU10 BASE Attention: Halogen bulbs is not available using on this Socket. Only for LED bulb.