This is product manufacturers code LLSRW by Leyton Lighting. If you need to contact us about this product, please quote our product reference of 1047.
This T4 socket, is re-wireable, (i.e. it's not sealed) so it can be used to make custom-length T4 link leads.
The socket is used to supply power to each T4 fitting. It connects to the built-in 'plug' at the end of each fitting. Re-wireable plugs are also available to allow you to make T4 link leads of any length.
This T5 socket is the same connector that is supplied on power input cable packaged with each T4 light fitting.