JACKYLED 4 in 1 E26 Light Socket Splitter Adapter Converter for Standard LED Bulbs 360 Degrees Adjustable 180 Degree Bendable Max Watt 240W - Amazon.com
Adamax Intermediate to Candelabra Base (E17 to E12) Light Bulb Adapter A1712E - The Home Depot
DZYDZR 10 pcs Bulb Holder E27 to B22 Adapter Converter - E26 Light Socket to B22 Light Bulb Base Socket, Fits LED/CFL Light Bulbs, Heat-resistant, Anti-burning, No Fire Hazard - Amazon.com
10 PCs) E14 to E26/E27 Light Socket Bulb Base Adapter LED-Light Bulb Converter | eBay