Ceramic Ceiling Light Bulb Holder E27 Portalamparas Screw Lamp Socket White Black Porcelain Bulb Base Fittings - AliExpress
Remote Control Light Bulb Socket, Bukeer E26 E27 Bulb Lamp Holder with Remote Control and 15/30/60 Min Timer - Amazon.com
Twin Bulb Splitter Adapter for Led bulb - 4Pcs Socket Splitter CFL Lightbulb E26 Bulb Outlet Adapter to Dual E26 Led Bulb Holder - US Power Adapter Screw in Plug Light Bulb
BLUECELL 12inches E27 to E27 LED Light Bulb Lamp Holder Flexible Gooseneck Extension Adaptor Screw Socket Extender - Amazon.com
Leviton 600-Watt 250-Volt White Outlet Box Lampholder R50-49875-000 - The Home Depot