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This study was supported by contract number DE-EE0001405 between the National Academy of Sciences and the U.S. Department of Energy. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the organizations or agencies that provided support for the project.

Cover: The Thomas Jefferson Memorial following a lighting system redesign in 2001 to include installation of metal halide lamps, induction lamps, and light-emitting diodes. The cove lighting application for the memorial utilizes io Lighting LLC’s Line .75 fixture, 3KHO, 45 degree beam spread in 18-inch daisy chained segments. Photograph copyright Peter Aaron/Esto. Reprinted with permission.

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