LH0891 Converts an E26/E27 medium base lamp holder/socket to a G9 lamp holder/socket
Black Iron Medium Base E26 Bulb Socket With Threaded Collar - Etsy
TWDRTDD 3Pcs E17 to E26 Socket Adapter,Intermediate base E17 to Standard Medium base E26 Converter - Walmart.com
E26/E27 Medium Base Socket With Threaded Collar (216SK-2248) - Action Lighting™, Inc.
10 Pack Lamp Socket Adapter E26 E27 ES Base To MR16 BP - 12VMonster Lighting
LoraTap Smart WiFi Bulb Socket E26 2 Pack Wi-Fi LED Light Bulb Timer Lamp Holder Adapter, Voice Control with Amazon Alexa and Google Home, Smart Life App Control from Anywhere by Phone,