E27 thermoplastic threaded lamp holder for String Lights
TORCHSTAR 3-in-1 Light Bulb Socket Adapter, Adjustable E26/E27 Lamp Holder Switch Splitter, Standard Base for landscape accent lighting, exhibitions lighting, artwork lighting - Walmart.com
E14 Bulb Holder Screw Lamp Base Socket Black/White Lamp Shade Ring Heat Resist | eBay
Porcelain Lamp Holder W/ Outlet And Pull Chain, Medium Base
Hanpearl Round E27 White LED Lamp Screw Base Halogen Bulb Holder Converter Light Bulb Base Lamp Socket Adapter (10 pcs) - - Amazon.com
Licperron Vintage Lamps Table Lamp Base E26 E27 Industrial Small Desk Lamp with Plug in Cord On/Off Switch Bedside Lamp Holder for Home Lighting Decor, Small Lamp - - Amazon.com