When electricity flows, it generates electromagnetic radiation. We call such energy a radio wave. A radio wave can be controlled by man using a transmitter to generate a signal. The signal can be modulated with sounds or made to carry other forms of information. On the other hand, when electromagnetic energy is not controlled, we call it noise or static.
Lightning is merely a very large, uncontrolled burst of static.
The Voyager spacecraft's receiver heard strong static as it sailed past Uranus. The chaotic signals received had the same characteristics as lightning noise. Voyager 2 found 10 previously-unknown moons, the largest only 90 miles in diameter, bringing the total to 15. The innermost, Miranda, was found by Voyager to be one of the strangest bodies in the Solar System, with fault canyons up to 12 miles deep, terraced layers and mixed young and old surfaces. Titania was marked by huge faults and deep canyons.