DEWENWILS Table Lamp Dimmer Switch for Dimmable LED/CFL Lights and Incandescent Bulbs, Full Range Slide Control, 6.6 ft Extension Cord, UL Listed, White - Amazon.com
Bakelite E27 lamp holder kit with switch
Project Source 1.42-in L x 1-in Dia Traditional Plastic Lamp In-line Cord Light Switch in the Lamp Parts department at Lowes.com
220V Dimmable Remote Control Lamp Holder E27 Sound Sensor Control Switch Lamp Base Intelligent Light Bulb Socket Wireless Switch - AliExpress