I did this on my previous Sundance. I used an aluminum channel that I stuck to the side with 3M double sided body molding tape. So no screws. I ran the molding close to the porch light and just dropped a short length or wire down into the light. Bought the molding
HERE at Superbrightleds.com. They have more styles also. You can see what I did by clicking the "My Mods" link in my signature below. It's on page 6.
One of these days I need to put together the same thing for my current Sundance.