2 Outlet Light Socket Adapter, E26 Bulb Socket to Outlet Splitter,Converts Medium Screw Socket into a Socket with Two outlets,Polarized Outlet,with Pull Chain Switch. UL Listed, White (2-Pack) - - Amazon.com
2/3 Prong Light Socket to Plug Adapter with 2 Spare Fuses and Switch, E26/E27 Light Socket Outlet, High Safety, Convert Light Bulb to Outlet Socket Adapter for Patio Porch Christmas Lights Decor - -
Leviton Outlet-to-Socket Light Plug, White R52-00061-00W - The Home Depot
Leviton Socket with Outlets, White R52-01403-00W - The Home Depot