The housings that I linked are 2-piece; there is an aluminum channel, and then there is a plastic frosted lens that snaps into the channel. *I drilled holes about 8-10” from the end of each section of channel (each section is 1 meter long), countersunk the holes, and then screwed them onto the side of the RV (using a dab of silicone at each screw/hole). *I then added a final hole through the channel and through the RV walk to run the wiring (also sealed with silicone). *This way, there is no wiring visible on the outside of the RV.
After that, I simply fed the wiring through that final hole to the inside (it came through just behind the slide out pantry; more on that later), installed the LED strip in the channel, and snapped the frosted lens into place. *Caps on each end finished the outside installation.
https://ibb.co/ky3PPv
Inside, the wiring dropped down (behind the pantry) into the area under the fridge, which is where my converter is located, as well as the 12vdc circuit breakers. *There was a vacant spot on the panel, so I bought a 6A push button circuit breaker to match the others and used that for my feed point. Finally, I installed an on/off/dimmer switch in the wall right inside the door (also accessible under the fridge) near the stock porch light switch.
Everything looks factory with no exposed wiring, and the channel/lens blends in so that unless you are looking for it, you don't even notice the 16’ long “porch light” just under the awning. *And the frosted lens did not degrade the light output in any noticeable way.
https://ibb.co/hJULxF