Sometimes during very cold weather, vertical columns of light beaming directly upwards are visible. These are called light pillars and are created by the reflection of light from ice crystals with near horizontal parallel planar surfaces.
NATURAL:Light Pillars, appear as eerily upright luminous columns in the sky. These are visible when light reflects just right off ice crystals from either the sun or artificial ground sources such as park lights
Photographers Manage to Capture Amazing Light Pillars In Northern Ontario
Sometimes called "a smile in the sky." One of the brightest, most colorful halos. Similar in appearance to a rainbow but it is actually formed sunlight refraction through horizontally-oriented ice crystals not raindrops.