The Illuminating Engineering Society is an organization dedicated to promoting the art and science of quality lighting. Its website is loaded with all kinds of great information for designers, architects and builders, including this case study about the lighting used in the 5-star AKASHA restaurant in Culver City, CA.
The article talks about how the lighting was picked and how LEDs and other lighting types were used to create "...an energy-efficient lighting system that maintained a warm incandescent look and feel with high visual drama."
This is an interesting look at how energy efficient lighting design can be applied on a practical level.
Photo thanks to AKASHA.