Lightstorms
Nuons travel in a straight path in a vacuum and will continue so through matter. However, their trajectory can be bent, through the use of affinity and (debatably) electromagnets and one of the results is that the nuons emit electromagnetic radiation in a process called nuoluminescence seemingly to correct their path. The higher the degree to which the trajectory is bent, then it is more likely that UV or even gamma rays are produced (which is always accompanied by some amount of visible light). Given the difficulty of this, visible light is more commonly emitted.
This leads us to lightstorms, which is a natural phenomenon usually seen near the poles. Nuons in a curved trajectory release photons of light.
The light phenomenon itself is harmless unless, of course, gamma rays are emitted. The danger comes from the disastrous effects such as nuon-poisoning all the way to the warping of reality. The bend is so powerful that no protection ever created was able to withstand lightstorms.
Manifestation
Usually heralded by a blinding flash of white or golden light, what looks to be flakes of multicoloured light will materialise out of nowhere, sometimes from the ground, sometimes in the air, moving in a straight line (which is not true as indicated by footage salvaged from crashed satellites). The speed at which the specks travel ranges from 2 km/h to 222 km/h.
Localization
Fortunately, lightstorms come in predictable seasons, allowing people to prepare and move away from the poles and the largest lightstorms are restricted to the poles. However, it seems that more out of season storms occur, moving ever so close towards the Belt.
