Sun-pillars are a column of light appearing to extend up from the Sun caused by flat fluttering ice-crystals reflecting sunlight from the upper atmosphere.
Light pillars form during freezing temperatures from flat fluttering ice crystals that form near the ground in a form of light snow. They then reflect ground lights in columns not unlike a Sun-pillar. This light pillar, below, was taken in Fairbanks, Alaska. The light surrounding an ice skating rink gave the light pillars the colorful array.