Just saw this post on reefbuilders. Very interesting:
http://reefbuilders.com/2012/12/19/t...ghting-secret/
They are making 6cm x 6cm led panels that can be chained together in any shape. Very nice looking design as well. There would be light absolutely everywhere in a tank running these but I'm sure they cost a fortune.
They are 3w CREE run at 1W for increased life and efficiency.. less heat (no fans).
Here's a video (they have a tiny clam in there doing quite well):
http://www.youtube.com/watch?v=aY-qhFgNVA8