Lamp holder E40 TO E40 lamp Holder Converter Lamp Base Adapter Extension 10PCS - - Amazon.com
Porcelain E40 lamp holder kit
ES Light Bulb Socket E27 to E40 LED Base Screw Lamp Bulb Adapter Converter White - Amazon.com
Adjustawings E40 Lamp Holder USA Cable - Available for All Models
E26/E27 to E39/E40 Light Sockets Adapter, Light Bulb Socket, Bulb Base Adapter, Converters Lamp Holder, Converts E39 Pin Base Fixture to E26/E27 Standard Screw-in Socket (Pack of 10) - Amazon.com
New E27 to E40 LED Light Lamp Bulb Adapter Converter Medium Screw Base Socket | eBay
Porcelain E40 lamp holder kit
Porcelain E40 lamp holder kit
400 W T46 Clear Metal Halide Lamp, GES/E40 Tubular Enclosed Fitting, 36000 lm, 20000h - AGS ELECTRICAL STUDY SERVICES