This is a gu10 lamp bases adaptor made of insulating ceramic with 15cm wire, which can fix your GU10 Base Bulb with 12V-265V. Two slotted holes for bulb pins, and the other two holes for affixing screws.
eBay
2pcs G9 Ceramics Aging Wiring Lamp Holder with Cable Led Light Converter Screw Bulb Socket Adapter Halogen Lamp Base
Aliexpress UK
The B15 to E14 lamp bulb converter is easy to use. Easy to replace. - Note: suitable for B15 to E14 light head. - Compatible for lamp bulb converting B15 to E14, convenient to operate, simple to use.
eBay
Vintage LED Lamp Hoder E14 DIY Industrial Pendant Light Bulb Base With Ring Retro Screw Socket Fitting Adapter Lampholder
Aliexpress UK
Condition Is Good, See Images Carefully. Images Are It's Own Description. Antique 30s-50s Bakelite Light Fitting Lamp Bulb Holder Switch Plug Adaptor 5 Pc Lot. Made In England. Circa 1950. I Am Not Sure For It's Working, May Be Need Restoration. These additional charges are the buyer's responsibility. Buyer have to clear the customs if there is any clearance hold in your country. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.
eBay
1-10PCS E27 Screw Vintage Lamp Stand Light Bulb Socket Holder Adapter Base Cap Socket Edison Screw Lamp Bulb Fixing Base
Aliexpress UK
Flexible Lamp Holder Clip E27 Lamp Base Led Table Desk Light Socket Lamp Book Lights Holder With On Off Switch. Flexible E27 Lamp Holder Clip Lamp Base Led Table Desk Light Socket Lamp Book Lights Holder With On Off Switch EU US Plug.
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1/5PCS 220V E27 Screw Lamp Stand Base Cap Socket Flat Light Bulb Socket Holder Adapter White Ceiling Light Lamp Bulb Fixing Base
Aliexpress UK
AC 110-220V E27 Lamp Bulb Adapter Flexible Light Bases Holder Flexible Converter with Switch Adapter Socket 20CM EU/US/UK Plug. Type: E27 with On/Off Switch. 1 x E27 Light Bulb Socket Adapter Converter.
eBay
〔YY32〕10Pc MR16 To GU10 Socket Base Halogen Light Bulb Lamp Adapter Converter High Temperature Resistance Conversion Lamp Holder
Aliexpress UK
Model: Switch Type Universal E27 Screw Hose Lamp Holder. - 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
10Pcs MR16 To GU10 Socket Base Halogen Light Bulb Lamp Adapter Converter High Temperature Resistance Conversion Lamp Holder
Aliexpress UK
E27 Light Bulb Socket Holder Features E27 Light Bulb Socket Holder Specification Max Power: 40W and less for incandescent light & No limit to an energy-saving lamp. Easily transform between the 2-hole socket and 3-hole socket.
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E27 Screw Port Sensor Lamp AC110-240V Wall Mounted LED Human Infrared Sensor Lamp Holder Intelligent Delay Head Adapter
Aliexpress UK
White E27 AC Power Cord Cable 1.8M Socket lamp Base Holder EU us UK plug eclectical led Lamp Bulb Light Adapterswitch wire for. Lamp holder: E27 screw. With pendant line plug lamp holder. 1pcs EU/US/UK plug hanging wire socket.
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10cm Wood Light Base Rechargeable Wooden LED Light Rotating Display Stand Lamp Holder Lamp Base Art with Power adapter
Aliexpress UK