Outlet to Socket Adapter,Plug-in Light Socket,Convert Outlet to Light Bulb Socket,Polarized 2-Prong Outlet to E26 E27 Screw Base Bulb Socket, 660 Watt, 125 Volt, UL Listed (4, Black Color)

Work perfectly using with extension cord and ceramic coil heater disc for reptile cage. The ceramic coil has stand light bulb male base so ya screw it into this bulb socket which then plugs into the extension cord. I use the heater coil under outdoor plants covered with fabric to protect against hard freezes . Well made enough for careful use, plastic could break hard use. These come in handy and price is reasonable.

Bought the 10 count and all worked fine and they are thick pvc built

Yup, these are fine. I normally gravitate toward the "full base" style, but with low wattage LED bulbs, these are adequate. Don't use them with legacy incandescent (200W!) bulbs, for instance.

They are very practical and easy to use, both for testing light bulbs and having temporary light at a plugin.

Fit standard bulbs and is working as expected

I love this item, very convenient.

Low quality in materials, but they work in a pinch.

Un producto muy bueno, para saber si tu corriente está funcionando perfectamente

Muy buena opción para enfocar en todas partes