To say that blue light is bad is actually an oversimplification. LED lights (including energy-efficient light-bulbs).This same blue wavelength is emitted by LED (light-emitting diode) lights, which make up the screens of several of the devices we depend on day in and day out. It emits a specific wavelength on the electromagnetic spectrum, but that doesn’t shroud us in blue or turn the objects it touches blue. So when we talk about blue light, we’re not necessarily talking about a specific color of light, but rather, a specific wavelength. Of the waves that make up the visible light spectrum (the small portion of the electromagnetic spectrum that we can actually see), blue light has one of the shortest wavelengths, while red light has the longest. When it comes to light, or really any electromagnetic wave, it’s all about the wavelength. If it’s all still fresh, you may even recall that the distance between these crests is called the wavelength. While your high school physics class may feel like a distant blur, you may remember learning that light travels in electromagnetic waves, each of which has high points known as crests. In this article, we’ll illuminate why that is, explaining the effects of the light, what we mean when we say blue light, and how you can minimize its negative impacts. Yet in the grand scheme of things, this is relatively new exposure for humans - after all, it wasn’t until the 21st century that LED technology became popular.Īs science has come to learn more about the light emitted by these devices, we’re finding out that these modern habits may have consequences for our health. What’s the last thing you do before bed every night? Whether it’s scrolling through social media or putting on a show to fall asleep to, many of us find ourselves glued to one LED screen or another after dark.
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