4pcs HID G12 to E26/E27 Light Socket Adapter Halogen G12 Lamp Base to Standard Medium E26 E27 Lamp Holder Converter: Amazon.com: Tools & Home Improvement
10 Pack Lamp Socket Adapter E26 E27 ES Base To MR16 BP - 12VMonster Lighting
Led Adapter E40 To E27 Lamp Holder Converter Socket Light Bulb Lamp Holder Adapter Plug Extender Led Light - Lamp Holder Converters - AliExpress