What are light pillars?

What are light pillars? Leningrad Region.
chudnov.photo
This atmospheric phenomenon occurs when there are low temperatures (below -15 C) and high humidity, which causes frozen ice crystals to form in the air.
What are light pillars? Pillars of light on the horizon which takes the railway in the North of Russia
Legion Media

Light from things like street lamps and car headlights then get reflected in them, forming these "pillars” of light.

What are light pillars? Naberezhnye Chelny.
Roman Pinchuk / Sputnik

These frozen multicolored ‘searchlight’ beams can be observed during the cold times of the year in various parts of Russia, from St. Petersburg to the Far East. 

What are light pillars? St. Petersburg
Petr Kovalyov / TASS

Have you ever seen anything like it?

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