I have an exterior light fixture with a photo cell that's meant to be mounted directly on a wall.(no mounting box) Can I take an unswitched hot to the light, connect the light and add another wire to the connection and go back inside to feed an exit light that needs an unswitched hot? If the exit light is mounted directly on the wall (no mounting box) could I make the splice in the exit light and go out to the exterior light? I guess I'm asking if i can make a splice in a light fixture so I can take a hot to another light.