another light on existing switch.

[scrivs]

hi
I am wanting to put another led light from a switch that is already being used, is it ok to drill through the side of the metal back box and wire in the blue and brown wires.

 

[littlespark]

It depends how the switch is wired.

If theres a neutral at the switch, then its possible....

If its only a live and switched live, (which could be a brown and blue) then, no you cant. You need a neutral