What is the blue light?
There are seven color in the visible light spectrum, blue light being one of them can be seen by human eyes. Blue light emits higher amounts of energy since its a short wavelength. Blue light used to only exist from the sun only, but by time it has been brought inside by way of digital screens ( laptops, smartphones, TV’s, tablets, and etc.). Exposure to this kind of light has its own disadvantages including fatigue, headaches, sleeplessness, and eyestrain.