Wataru Kaga, Japanese contractor, snaps the outer cover of an exit sign into place after installing energy efficient light emitting diodes at the Misawa Club Complex at Misawa Air Base, Japan, Oct. 19, 2012. The newly installed LEDs have a 7-year lifespan and will save the club approximately $1,500 in labor costs and bulbs a month. (U.S. Air Force Photo by Tech. Sgt. Phillip Butterfield)
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