Light Pillars - Anchorage Alaska 
Pillar image index
Light Pillars - Anchorage, Alaska imaged by Michael Sierra December 2003. Produced by reflections of artificial lights from the lower faces of plate-like crystals, usually light pillars appear like beams shining upwards from the lights. Here the ice crystals are floating in layers and the reflections look like candles hanging in the sky. ©Michael Sierra, reproduced with permission.