I just ran across pictures from the 2009 Light+Building tradeshow on LimitedHype. Above is my favorite (coincidentally the favorite of the author of the original post as well! great minds.) Go check out the rest of them, LED lights (as were apparently a trend at last year's show) typically can operate with 30-60 watts of electrical power, and are considered efficient because of their high light output for the relatively low power needed to run them.
Plus, LEDs are beautiful and versatile. Double win!