JELECTRICALS conversion lamp head for 220 volts. This means you can choose more leds to fit your fixture or lamp holder instead of replacing your fixture with a new one. The socket converter is easy to use, just screw it into an existing socket and look like a part of the socket. This allows you to choose more led lights to adapt to your fixture or base, rather than replace you fixtures with a new one. Suitable for led, halogen, filament or cfl light bulb. easy to use -the socket convertor is easy to install.