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WHAT IS BLUE LIGHT?

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Blue light is part of to the visible light spectrum and has a short wavelength and high energy. The main source of blue light is the sun, but there are also many other non-natural sources of blue light, such as computer screens, screens of smartphones and tablets, street lights, billboards, modern room lighting, and many more. Nightly artificial blue light exposure interferes with our circadian rhythm by suppressing the natural melatonin production, which can make it difficult to fall asleep.
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