Not so long ago, one of the most compelling reasons for daylighting a space was energy savings. Since the 1970s, lighting has been one of the largest users of electricity in buildings. But advances in lighting technology, namely the rapid improvement of LEDs, which are longer-lasting and more efficient than more traditional sources, are changing the discussion. Lighting’s energy consumption has been on the decline, representing 17 percent of electricity end use in commercial buildings in 2012, according to the U.S. Energy Information Association, down from 38 percent in 2003. Electric illumination’s slice of the energy pie should fall even more as LEDs develop further and their controls become both more sophisticated and more user-friendly.
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