The 509th Civil Engineer Squadron engineers recently replaced fluorescent lights (bottom left) with light-emitting diode (LED) lights (top right) at Whiteman Air Force Base, Mo., Oct. 21, 2015. LED lights eliminate light pollution, directing light towards the ground and producing accurate color rendition. The lights also have a ten year life expectancy which reduces cost and manpower. (U.S. Air Force photo by Senior Airman Joel Pfiester/Released)