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Why Is Blue Light Before Bedtime Bad For Sleep?


Blue light

Scientists have been cautioning against using light-emitting devices before bed. Why?

Credit: Thinkstock

In the modern age of technology it is not uncommon to come home after a long day at work or school and blow off steam by reading an e-book or watching television. Lately, however, scientists have been cautioning against using light-emitting devices before bed.

From Scientific American
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