Lighting continues to be a huge chunk of a building’s annual energy costs—between 20 and 40 percent. While the need for light will never go away, analyzing its costs through energy modeling can help secure the installation of more efficient technologies.
Improving the efficiency of our nation’s buildings certainly isn’t a new goal. The energy crisis of the 1970s spurred a wave of energy-reducing innovations, including the first generation of building-mounted photovoltaic (PV) panels to produce electricity on-site. Since then, the U.S.