10/21/2012 - Wataru Kaga, Japanese contractor, energizes a row of light emitting diodes in an exit sign at the Misawa Club Complex at Misawa Air Base, Japan, Oct. 19, 2012. The Misawa Club Complex will be changing more than 1,200 standard bulbs for more energy efficient LEDs, which will save approximately $42,000 over a 7-year period. (U.S. Air Force Photo by Tech. Sgt. Phillip Butterfield)

10/21/2012 - 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)