Unfortunately I don’t have the wiring diagram as I threw it out when I was done, in any event it wires up exactly the same as a standard light switch, the only extra piece is the fitting of a filter across the terminals at the light where
it enters the ceiling – that consisted of two wires with one wire to both power wires at the bulb socket… My switch is controlling some LED downlights and worked without the filter, I also fitted a single gang in the bathroom which also has downlighters but
there the bulbs are quite old cfl type and without the filter the lights were staying on…
