| | | | | | | Day 2: Get more light during the day | | | | There's a scientific reason behind "lights out." Exposure to light, even the blue light from your phone, makes it harder for your brain to shut off, which affects the quality of your sleep. But getting more sunlight during the day is good for your circadian rhythm, which keeps your sleep cycle in balance. If you often wake up too early or fall asleep too late, here's how more light can fix it. | | | | | | |  | | |
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