This a view Ólafur Elíasson's The Weather Project, an art installation at Tate Modern in London, 2004.
In this photo I've made the visitors the main subject (it was Elíasson's intention that they became part of the work), omitting the centre piece, which was a large 'half sun' at the end of the hall. The ceiling was mirrored which is why people are lying on the floor looking up. The air was mist-filled and the light really was that colour!
There are more shots in this set: www.flickr.com/photos/aderowbotham/sets/486498/
See more of my best shots on my photo blog.