![]() The blue light with the lowest wavelength means that it exerts more energy on the subject, which has a dramatic effect on the photoreceptor cells, resulting in loss of vision/sleep. The wavelength below the range is an ultraviolet spectrum that is invisible to the naked eye. Compared with other lights, blue light has the shortest wavelength from 400 to 495 nanometers. What is the blue light exactly? Blue light refers to the visible spectrum that the human eye can see and retrieve. This is because of the blue light emitted by various technical sources such as LED, smartphone, laptop and so on. If you consecutively use smartphone or laptop especially at night, you may have difficulty in falling asleep. ![]()
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