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blue light

What is Blue Light?

By Mel   •   January 2nd, 2020

Blue Light

Blue light is a range of the visible light spectrum, defined as having a wavelength between 400−495 nm. This short wavelength means that blue light is a type of high-energy visible light, defined as having a wavelength between 400 and 450 nm. Not all colours of light have the same effect. Blue wavelengths—which are beneficial during daylight hours because they boost attention, reaction times, and mood—seem to be the most disruptive at night. The increased use of devices as well as energy-efficient lighting is increasing our exposure to blue wavelengths, especially after sundown. Blue ...read more

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