What is Blue Light?**
Natural blue light is all around us. It's what makes the sky look blue. Natural blue light regulates your sleep and wake cycles. It also boosts alertness, elevates your mood, and increases feelings of well-being. Artificial blue light, found in things like computers and flat screen televisions, LED lights and energy-efficient light bulbs, can be harmful to your eyes. The backlit displays on cell phones, e-readers, and laptop computers emit high amounts of very strong blue light waves. Too much blue light can take a toll on your health.
Within the visible light spectrum, blue light has a shorter wavelength and higher energy, which is harder for our eyes. Because these waves are shorter, they appear to flicker more than longer, weaker wavelengths. Flickering is the flashing effect that happens when the LED backlight controller of a monitor adjusts the brightness levels during display refreshing. This causes eye fatigue without you even noticing. Take a look at the light spectrum to see how blue light works.