For cabin lights I went through 3 iterations before going final with aluminum panels of LED strips fed from a single pulse width modulating dimmer and a selector switch (red-off-white) mounted on the panel. There are red panels in the strakes + instrument panel lip, and white panels in the strakes and overhead rear. Each panel is 0.5 meters long, and 10 strips of 36 LED's, for a panel of 360 LED's. The max draw is 5.3a for the 3 white panels at full output. Below I show both the LED strips and the amperage test set up. The wire runs are short, and I used 20 awg from main bus (15a) to dimmer to red-white switch, and then switch to the point where the current is split right-left-rear. From that point I used 22 awg.