Amazon.com: Maxxima Light Bulb Socket Splitter - 1-into-2 Converter, Ideal for LED, CFL, and Incandescent E26 and E27 Bulbs, Up to 660W, UL Listed for Garage, Closet, or Workshop Use - 3
Dual Twin Light Bulb Socket Adaptor Splitter Double Y Type Converter Lamp Base ! - Walmart.com
Leviton 660-Watt Double Light Socket Adapter, Brown 128 - The Home Depot
2 in 1 E27 Lamp Socket Splitter Adapter Light Double Y Stand Bulb Holder Y6H9 | eBay
2 In 1 Double Socket Base E27 To 2-E27 Extender Splitter Converter Plug Halogen Light Lamp Bulb Holder Copper Contact Adapter - AliExpress
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
Leviton 660-Watt Keyless Twin-Socket Lamp Holder Adapter R52-00128-00W - The Home Depot