Bulb Adapter Converter - TOOGOO(R)10 pcs E27 - G9 LED Bulbs Screw Adapter Converter Use this lamp socket convert adapter E27 to G9 lamp socket. Convert E27 bulb socket G9 lamp holder. Easy to use and allow standard lamps or fluorescent tubes. Type: E27 to G9 Size: 4.5 cm x 3 cm