Lamp holder with external thread for 1 bulb E27 white - Cablematic
Amazon.com: Bahong Smart WiFi Light Socket,Smart Home Mini Socket,E26/E27 Lamp Bulb Adapter with APP Remote Control Timer,Wireless Remote Control Lamp Holder,Only Support 2.4GHz Network (1PC) : Industrial & Scientific
Ceramic E27 lamp holder kit
LH0758 E26/E27 medium lamp holder/socket with spring clip mounting and set screw connections
Screw ES E27 M10 Light Bulb Lamp Holder Pendant Socket Lampshade Collar B&SE | eBay
Smart WiFi Bulb Socket E27 Light Bulb Adapter Wireless Intelligent Control Lamp Holder Compatible with Alexa, APP Remote Control (only 2.4 GHz) and Group Control Timer Function, 1PC … - - Amazon.com
E26 to E26 Socket Extender,TWDRTDD E27/E26 to E27/E26 Lamp Holder Adapter (3Pack) - - Amazon.com