E26 light bulb three prong outlet adapters:

Light Bulb to Outlet Adapter for Recessed Lighting | James White Socket/Plug Adapter
660-Watt Lamp Holder to Outlet Adapter, White
White finish
Medium Light Bulb to Outlet Adapter
NEMA 1-15R outlets, non-grounded outlet
15 Amp, 660-Watt, 125Volt 2P, 2-Watt

E27 507-4 porcelain Light Bulb to Outlet Adapter
Model NO: E27-507-4
Type: E27 Screw
Rated at 250V 4A 660W
Material: ceramic, iron, aluminum, copper
Dimension(cm):4.9 x 3.8 x 3.8; 5.7 x 3.8 x 3.8
Weight (Kg):0.062
Place of Origin: Fujian, China

Light Bulb to Outlet Adapter Specifications:
E27 lamp holder/Light Bulb to Outlet Adapter/light bulb socket
Terminal block: zinc, copper
Center connects: copper, iron
Bulb circle: copper, aluminum, iron
Bracket: iron
Starting voltage to 5 kV
Screw Porcelain Lamp holder
For screws ISO 1207 – M4, ISO 1580 – M3
Color: beige, white
Cable chooses: silica, braided, Teflon
Available wire:0.75mm2; 0.5mm2