Which Fitting?

E26 or E27 Edison Screw?

There is only a 1mm difference between the threads of E26 and E27 so they are mostly identical, but it's important to purchase the correct bulb certified for use in your country.

An easy reference of what Bulb is recommended for major markets is as follows:

Here is a complete list of countries and the standard Edison Screw type used.

The following countries use E26 bulbs:

The following countries use E27 bulbs: