Two slotted holes for bulb pins, and the other two holes for affixing screws.This is a lamp bases adaptor made of insulating ceramic with 15cm wire, which can fix your Base Bulb with 12V-265V. - Size: 15cm wire length.
eBay
〔YY32〕 E12 To E14 LED Lamp Bulbs Holder Adapter Converter Candelabra Base Socket
Aliexpress UK
【Product Type】: T20 7440 Bulb Holders suitable for car series with 7443 bulb holder. 【High Quality Material】: Wire socket connector is made of high quality material, high heat resistance. We'd like to settle any problem in a friendly manner.
eBay
4 Pcs Converter G9 to E14 Lamp Holder Light Bulb LED Lightbulbulbs Metal Adapter
Aliexpress UK
This motion sensor light bulb socket is suitable for E27 screw on illuminates, it can convert your ordinary light bulb into an infrared sensor light. Change Normal Bulb into Motion-Sensing Light, simply screw sensor light socket unit into any existing indoor light socket and add a light bulb.
eBay
AC85-265V E27 Led Lamp Base with Motion Sensor PIR Human Induction Light Bulb Holder Socket Adapter Converter Adjustable
Aliexpress UK
Easily transform between 2-hole socket and 3-hole socket. Be ideal for walk-in closet, laundry room, garage, living room, bathroom, aisle and stairs. 1 Light bulb holder socket. Max Power: 40W and less for incandescent light & No limit to energy-saving lamp.
eBay
E27 PIR Induction Sensor Adapter Smart Motion Sensor Light Bulb Holder Lamp Base Converter Automatic LED Switch AC 110V 220V
Aliexpress UK
Model: Switch Type Universal E27 Screw Hose Lamp Holder. 1pc x E27 LED Lamp Socket. Plug: EU Plug, US Plug, UK Plug. - Versatile Functionality: Multi-functional as an LED wall light, bedside light, night light, reading light, work light, and more, catering to diverse lighting needs.
eBay
360 Degrees Human Induction Motion Sensor Lamp Socket Base AC85-265V Delay Time Switch E27 Base Holder Socket Adapter
Aliexpress UK
Category: UK AC plug E27 LED bulb bulb adapter converter with ON/OFF switch. Type: E27 (British standard). Color: White. The product is made from bakelite adhesive. It's easy and safe to use. It's easy to install and widely used in many fields.
eBay
Smart Motion Sensor Light Bulb Holder E27 PIR Induction Sensor Adapter Lamp Base Converter Automatic LED Switch AC 110V 220V
Aliexpress UK
Material: Bakelite. 10PCS Lamp Holder Adapter E27 Light Base Standard Bulb Base E27 Bulb Base. Stainless Steel Chimney Cap Round Roof Rain Chimney Cover Flue Stove Cap. 8 Pcs Unfinished Handheld Mirror Kids Craft Small Mirrors for Crafts.
eBay
4PCS Socket Connector Adapter New GU10 Ceramic LED/CFL/Halogen Lamp Holder 18CM
Aliexpress UK
2 Pcs Wall Mounted Magazine Rack Acrylic Brochure Holder Clear Display. because this adapter is usingalloy materials. - Crafted from alloy material, this sloped ceiling adapter can ensure durability and aesthetics.
eBay
E27 E26 PIR Motion Sensor lamps holder 110-240V Detector Base Light Switch With Light Control Smart Bulb Socket Adapter
Aliexpress UK