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The Boston Globe


Science in Mind

Energy-efficient lights a threat to sleep?

For years, Dr. Charles Czeisler has studied sleep. The chief of the division of sleep medicine at Brigham and Women’s Hospital knows that the invention of the light bulb has profoundly altered human life and biology.

But in a perspective piece published Wednesday in the journal Nature, Czeisler argues that the sleep deficiencies that have become so pervasive among adults and children may be threatened yet again by technological progress: LEDs (light-emitting diodes) that consume far less energy than incandescent bulbs.

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