The VIViD festival of light and sound, curated by Lou Reed and Laurie Anderson, photos here including the Rocks, Fire, Water pageant, the 17th Sydney Biennale festival of contemporary art, photos here and, independently, a day of NNZ Government Rail history here.
A photo from each one:
(this was not an artist's exhibit but what happens in a dark room when spectators finish their drinks but still don't want to go outside).