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What is a blue light?
The human eye gradually adapts to natural light sources as it evolves naturally. But in just a short period of 100 years, human technology has evolved with each passing day, producing a variety of artificial light sources. These new artificial light sources will generate a large amount of blue light, which represents 26% of the light emitted by compact fluorescent lamps, which are energy efficient and increasingly popular. It also includes smartphones, computers, TVs, and more.

It can almost block the blue light of computers and smartphones.