Light pillars are optical phenomena that occur when light reflects off ice crystals suspended in the atmosphere. These crystals, often found in cold weather, act like tiny prisms, bending and refracting light to create vertical columns of brightness that appear to rise above or below a light source, such as the Sun or streetlights. Typically seen in polar regions or during winter months, light pillars can be observed at sunrise or sunset when the angle of the light is just right. They are most commonly associated with cold temperatures and can be a beautiful sight, captivating those who witness them.