To bring the Nav/Strobe cables out to the wing tips, we acquired some thin wall irrigation (?polyethylene?) tubing from Home Depot.

Here the electrical conduit races past the Pitot-Static termination point and the aileron bell-crank support in the port wing.

The inboard terminus of the tubing and aileron quick-connect plate at the spar of the port wing.

I chose a Whelan Lights system. FlightCrafters had tempaltes for the system, so I copied them onto 3 mm ply, installed some nutplates for the fixtures and bonded these bases on to the tips