The U.S. Department of Energy FLEXLAB test bed that rotates 270 degrees is shown at Lawrence Berkeley National Laboratory in Berkeley, Calif., Thursday, July 10, 2014. The FLEXLAB, a lab that will be ... more 
The U.S. Department of Energy FLEXLAB test bed that rotates 270 degrees is shown at Lawrence Berkeley National Laboratory in Berkeley, Calif., Thursday, July 10, 2014. The FLEXLAB, a lab that will be used for studying energy efficiency in commercial buildings, contains four separate labs that can test-drive different technologies, including HVAC systems, lighting and windows. (AP Photo/Jeff Chiu) less 
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Associated Press | Photo By Jeff Chiu
Thu, Jul 10, 2014 7:15 PM EDT