Light pillars are stunning vertical beams of light that extend upward into the sky, often appearing in cold weather. They form when artificial or natural light reflects off ice crystals suspended in the atmosphere.
The process requires specific conditions:
- Temperatures cold enough for ice crystal formation
- Flat, hexagonal ice crystals that act like mirrors
- Calm conditions allowing crystals to orient horizontally
- A bright light source (sun, moon, or artificial lights)
These crystalline mirrors reflect light in a column, creating the illusion of a pillar. While most common in arctic regions, they can occur anywhere with the right conditions.