Hanpearl Round E27 White LED Lamp Screw Base Halogen Bulb Holder Converter Light Bulb Base Lamp Socket Adapter (10 pcs) - - Amazon.com
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
E27 Extension Lamp Holder 4cm Lampholder Led Light Holder Base Socket 30pcs - Lamp Bases - AliExpress
GU10 Ceramic Base Socket Lamp Holder with Wire Leads
Fluorescent Lamp Holder (Socket) #077-5214-01
Marquee Light Bulb Sockets | Flush Mount Lamp Holder
Leviton 600-Watt 250-Volt White Outlet Box Lampholder R50-49875-000 - The Home Depot
LH0400 E27/E27 med base incandescent lamp holder/socket with two hole mounting and screw terminals
Leviton 660-Watt Keyless Twin-Socket Lamp Holder Adapter R52-00128-00W - The Home Depot
E26 to E26 Socket Extender,TWDRTDD E27/E26 to E27/E26 Lamp Holder Adapter (3Pack) - - Amazon.com