LED noise
What kind of wire are you using to sevice them? Is it a single wire with return through the wing and fuselage, or shielded-twisted pair. If it's the former, I would recommend replacing it with the latter. These LEDS use a pulse width modulator/inductor voltage converter which generates lots of harmonics. When unbalanced conductors are used on the pulsating power lines they will radiate. Usually if the circuit has sufficient capacitance on the power input there will not be transients flowing on the power wires. But if the circuit doesn't have good filtering on the power leads, the next best bet is to use the STW. Twisted pair wires carrying equal and opposite pulsating currents which generate opposing magnetic fields which will essentially null out any radiated fields. Having them contained in an overall shield grounded at the power source adds additional isolation.