Joined
·
24,746 Posts
Sounds like the shed might be wired with conduit. If that is the case then you only pull the wires you need into the conduit. The white doesn't need to go to the switch only the hots.
For your new light you would add a new black wire for the new light and pull power from the wire that is feeding the existing switch. You will need find the neutral for the light. It will be at the current fixture.
For your new light you would add a new black wire for the new light and pull power from the wire that is feeding the existing switch. You will need find the neutral for the light. It will be at the current fixture.