Artificial light pillars photographed by Lori CHECKOWY near Toronto, Canada, on January 22, 2003. Mrs. CHECKOWY was able to identify the source of the two brightest pillars pictured here: they were spotlights from a lumber-yard in King City. The other, less articulate light pillars to the right of the picture, originated from a high-school ground. For displays like these to occur, ice-crystal plates have to form close to the ground. At the time Mrs. CHECKOWY took her picture, the ground level temperature was about -15° Celsius. The photo was taken using a Ricoh 28 mm lens, and an exposure of 15 to 20 seconds at f/2.8.
[© Lori CHECKOWY - Photo used with permission (more pictures by Lori CHECKOWY can be found on www.spacew.com; for more images of light pillars in general see www.atopics.co.uk)]