Will Blue Light From Your Phone Disrupt Your Sleep? What We Know

 Light from smartphone screens, tablets, and computers has widely been thought to be disruptive to our natural circadian rhythms. As a result, an industry has sprung up around “sleep hygiene.”

But a new studyTrusted Source released last month in the journal Nature suggests that so-called blue light — the type of light emitted from these devices — may not be as disruptive as previously understood.

The study from the University of Basel and the Technical University of Munich, studied “effects of calibrated blue–yellow changes in light on the human circadian clock.” Researchers exposed 16 subjects to three different types of light for an hour before they went to sleep for the night. After using blue-dim, yellow, and constant white background/control light, the study authors determined that there was “no conclusive evidence for an effect of calibrated silent-substitution changes in light colour along the blue–yellow axis on the human circadian clock or sleep.”

Light itself can be a general disruptor to human sleep patterns, but perhaps not in the way that modern devices may have been seen in recent years.

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