You can now read 10 articles in a month for free on BostonGlobe.com. Read as much as you want anywhere and anytime for just 99¢.

The Boston Globe

Metro

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.

Loading comments...

You have reached the limit of 10 free articles in a month

Stay informed with unlimited access to Boston’s trusted news source.

  • High-quality journalism from the region’s largest newsroom
  • Convenient access across all of your devices
  • Today’s Headlines daily newsletter
  • Subscriber-only access to exclusive offers, events, contests, eBooks, and more
  • Less than 25¢ a week