Most people are completely unaware that the sources of artificial blue light are everywhere; in today's modern world you simply cannot escape it. All modern devices which produce a light source will produce some amount of blue light even if it doesn't appear to actually look noticeably blue.
In fact, all artificial, electric-powered devices which produce a light source will emit blue light to varying degrees, even if it doesn't look blue.
The most common sources of artificial blue light include:
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