Closer look at another bright "trumpet pillar" seen over Sigulda, Lativia, on December 28, 2008. This one is of a yellowish colour which suggests that it was caused by a high pressure sodium light bulb (as opposed to mercury vapour lights which have a blue-white colour).

See also the captions to OP-PM-04 and OP-PM-05.

[© Aigar TRUHIN - photo shown with permission (image found on spaceweather.com)]