Every existing display case light (left) will be replaced with LED lights (right) in the South Dakota Air and Space Museum in Box Elder, S.D., Feb. 26, 2013. All other light fixtures in the SDASM will also be converted to LED lights as part of a pilot project funded by MDU Resources, and executed in part by the 28th Civil Engineer Squadron. (U.S. Air Force photo illustration by Airman Ashley J. Thum/Released)