So what, exactly, causes this phenomenon?

("Morgans" wrote)
A city council (or business) with some money to spend, renting spotlights?


I've seen the local skating rink light pillars as a kid - I remember those.
But to have the whole night sky filled with what look the Northern Lights,
along with rows upon rows of colorful light pillars, in any direction you
look - that's pretty rare ...for me anyway.

http://antwrp.gsfc.nasa.gov/apod/ap020902.html

http://www.sundog.clara.co.uk/halo/lpil.htm

http://www.photon-echoes.com/pillars.htm


Montblack
Who, last night, forgot he now owns a digital camera. Doh!