I think the problem with simply stating "Light" as the subject is that light itself is so elusive, yet it surrounds us, we live in it, so our natural instinct is to find something tangible to represent light, usually something which is lighted up, shining, either from within or with something shining light directly on it. Darkness contrasting with something shining out from an artificial light source..... etc. With natural light, yes, people think of fog, which diffuses light, sometimes creating a special magic, or sunsets and sunrises, or, as you mentioned, sunflares (sometimes called "sunstars") radiating light. Sunshine and shadows flirting with each other is often a way people choose to show "light," too. On the surface, such a seemingly simple and obvious subject, "light," but it can be surprisingly complex.....