Virginia Tech’s Solar Decathlon Entry: Lumenhaus.

The Solar Decathlon, run by the US Department of Energy (and sponsored in part by Popular Mechanics) is held every 2 years on the National Mall in Washington, D.C. The competition in 2009 saw some surprising entries and innovative solutions to passive design and solar technology. A selection of 20 college teams competed in the fields of architecture and engineering to design, build and operate the most attractive and energy-efficient solar powered home. Winners of the competition gain international recognition for their designs.