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Fichier:Red-YellowGreen-Blue LED spectra.gif — Wikilivres
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File:Red-YellowGreen-Blue LED spectra.png - Wikipedia
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electromagnetic radiation - Why does the LED light colour spectrum spike in the blue and green wavelengths but CFL lights have lots of smaller spikes across a few wavelengths? - Physics Stack Exchange
There are also benefits of LED: found an example - Light Pollution - Cloudy Nights
A Reality Check on Blue Light Exposure - Illuminating Engineering Society