U.S. Department of Energy Deputy Secretary Daniel Poneman speaks during a preview opening of the U.S. Department of Energy FLEXLAB at Lawrence Berkeley National Laboratory in Berkeley, Calif., ... more 
U.S. Department of Energy Deputy Secretary Daniel Poneman speaks during a preview opening of the U.S. Department of Energy FLEXLAB 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 7:27 PM EDT