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Light at Night: The Latest Science

A panel of leading experts was assembled to explore what today’s science can tell us about light at night. While it remains unproven that typical exposures to outdoor lighting have negative health impacts, this cannot be ruled out without more empirical data and a standard metric for quantifying the relevant light exposures. LED technology holds tremendous potential for energy savings, but it is not yet clear whether its spectral characteristics will offer advantages over other light sources in terms of vision and circadian regulation.