Staff Sgt. Hector Guardado, an electrical systems craftsman with the 380th Expeditionary Civil Engineer Squadron, tightens a screw while Airman 1st Class Codey Phillips, an electrical systems apprentice, holds the solar light in place. The pair is installing a solar street light in the munitions storage area at the 380th Air Expeditionary Wing Oct. 17, 2011. The engineers will install 24 energy efficient solar lights that will provide fossil fuel savings while also enabling fixed lighting in an area of the base that is not connected to the energy grid. (U.S. Air Force photo/Master Sgt. Chance Babin)