Magazine article Work & Family Life

Too Much 'Blue Light' at Bedtime?

Magazine article Work & Family Life

Too Much 'Blue Light' at Bedtime?

Article excerpt

Twenty years ago, when many of us started using computers, we were advised to sit an arm's length away, to avoid electromagnetic radiation from our monitors. Those old screens are a thing of the past, and almost all of today's computers, tablets and gaming devices have LED back-lit screens.

But the new screens emit something too. It's called blue light. And while it may be of lesser concern, the reality is that people (of all ages) are spending more and more hours using back-lit devices, especially at night, and blue light may interfere with sleep.

Blue light research is just beginning and we don't know yet how to determine which LED screen variables affect sleep the most. For example: Is it the brightness of the screen, its size, your distance from it, or when and how long you use it? …

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