How can i turn my lights off
 

As title.I dont want my lights on permanently, so which wire do i cut and install a switch in so i can have them on when i want.many thanks.(2013 Gas Gas 250 ec electric start).

Use a voltage meter, and check the wires feeding the light. The one with current...is it.

if it is not something you are thinking of doing every ride, just unplug the three pin plug from the back of the light...