Adaptor – G23/E27 to G24 LED Bulbs Socket Changer Bulb Adapter E27 G24 : Amazon.de: Lighting
Bonlux 13W G24 LED PL Retrofit Lamp Universal G24d 2-pin G24q 4-pin Base 21mm LED Plc Lamp 26W CFL Equivalent LED PL Horizontal Recessed G24q Bulb, Remove/Bypass the Ballast, Daylight 6000k -
E-Simpo Gx23 to E26 Adapter, Gx23 to E26/e27 Lamp Base Converter, 2Pin Light Sockets Adapter, Need Bypass Ballast and Rewire. Double Tab.2P in Parallel (60-Pack) - - Amazon.com