Metal Lamp Socket Holder | Screw Light Bulb Holder | E27 Socket Lamp Holder - Lamp Base - Aliexpress
E27 Edison Screw Cap Socket Ceiling Light Bulb Holder GX Base Stand Fixing L0V5 - Walmart.com
Wooden Bulb holder | String lighting Kit Filé system
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
Sci-Supply E10 Mini Bulb Holders, Package of 10, Miniature Lamp Holders for Simple Circuits, Physics: Amazon.com: Tools & Home Improvement