The first visible-spectrum LED was built at General Electric ... By mixing the red, green, and blue colors, this LED can emit white light The first white LEDs weren’t explicitly white LEDs.

such as green and red LED lamps, do not pose as significant of an eye safety risk.” As a rule of thumb for people in general, the ICNIRP suggests that the spectrum of a source that appears to be white ...

1 shows a white-light LED in action). It is possible to generate ... two or more wavelengths are required to generate a broad spectrum of light that is a better approximation of a black-body ...

White light is made of a spectrum of different colours ... after an outbreak of bubonic plague led to Cambridge University closing in 1666. Newton purchased his first prism and returned to ...