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It is night. You are about to sleep. You start getting ready, hearing the rain outside in the Southern California storm. The lights are off. You get in bed. You are getting sleepier, but then you hear a noise and your phone lights up. You respond. It takes a while to get the conversation to finish, and you try to sleep again. But it’s harder now. Why? That’s because phones emit something called blue light. It affects your body in a multitude of ways, one of which includes the disruption …