Donald Young Gallery will have a show of Dan Flavin's work opening this Friday. I don't think I've ever seen any of his earliest lightwork pieces like this one from 1961 titled, Holy Sculpture.
There'll also be several examples of the work Dan was later known for like this (Untitled) for Ellen piece from 1975.
Donald Young Gallery
The Santa Fe Building
224 S Michigan Ave
The exhibition runs from Friday, September 25 to November 14, 2009.