American Council for an Energy-Efficient Economy (ACEEE), Feb. 28, 2014, by Joanna Mauer.
http://aceee.org/blog/2014/02/new-refrigeration-efficiency-standard

"The Department of Energy (DOE) issued a final rule for strong new efficiency standards today that will take a big bite out of the energy consumption of the refrigerators and freezers used in supermarkets, convenience stores, restaurants, and commercial kitchens. The significant reductions in energy use that we’ll see with the new standards are made possible by the availability of technologies including LED lighting and occupancy sensors, high-performance glass doors, and high-efficiency motors, which all provide big efficiency gains." Includes a link to the final rule.