Add Yahoo as a preferred source to see more of our stories on Google. Light plays a key role in our internal clocks, and doctors have theorized for years that red light therapy can help you sleep. Red ...

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In low-energy bulbs an electric discharge passes through argon gas containing mercury, which generates UV light. This in turn activates the coating on the inside surface of the bulb, which shines ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? Red light therapy is the best beauty invention to ever happen to my skin. Full ...