Light Switch, Power Switch Etc?

I was thinking about incorporating some sort of Power Switch in my map. I wanted to have it so as soon as the lever is hit all lights are turned on and the Traitor Tester starts working (about half of the lights still will work without power). I know you are not supposed to name most light entities any suggestions how to do this?

Its fine if the whole lot, have the same name, since they can all only be turned on.