E14 to E14 Extension Socket E27 to E27 Adapter Lamp Holder E27 E14 Bulb Socket Converter Lamp Base Plug Socket LED Light|Lamp Bases| - AliExpress
LED Adapter for LED-Lighting E27 to E27 Socket, short arm, 5,90 €
Superdream E12 to E26/E27 Adapter - Chandelier Socket (E12) to Medium Socket (E26/E27) Converter, Max Wattage 1000W, 200℃ Heat Resistant, No Fire Hazard (10-Pack) - - Amazon.com
uxcell E27 to Dual E27 Adapter LED Light Socket E27 to 2 E27 Converter Bulb Base Splitter Lamp Holder - - Amazon.com
Amprobe E27 Light Check Adapter | Amprobe
Pack of 2) GU10 to E26/E27 Adapter - GU10 Bayonet Base to E26/E27 Edison Screw Bulb Socket Adapter Converter - - Amazon.com
5-Pack Gu10 to E27/E26 Adapter JACKYLED 2 Pin Bayonet(Gu10) Base to Medium Screw(E26/E27) Base Lamp Socket Converter Maximum Wattage 150W 200℃ Heat Resistant No Fire Hazard - Led Household Light Bulbs -
E26/E27 to E26/E27 Lamp Bulb Socket Extender Adapter
G9 To E27 Adapter G9 to E26 Lamp Holder Converter Power Adapter Base Socket LED Light Bulb Extend Plug|Lamp Holder Converters| - AliExpress
LED Light Bulb Lamp Socket Adapter Convert E27 Base To Regular U S/EU Plug | eBay