This is great for keeping you active in the late hours for a big project deadline, or if you’re trying to stay awake, but it’s not as great when you’re trying to sleep. The issue is when that blue light comes at times – say, late in the day – that mess with your circadian rhythm, telling your brain that it isn’t yet time to shut down for bed. The important thing to remember is that blue light is a natural part of sunlight, and helps to keep us alert. We wouldn’t be doing our job if we didn’t come armed with some good, hard facts. OLED smartphones emit a lot less blue light than LED displays (Image credit: Shutterstock) Blue light: the science
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