It’s only natural to come home after a long day and unwind in front of the TV. Or maybe you just can’t resist checking a few emails right before going to bed. Either way, the blue light that’s emitted from screens is a common reason why people experience restless sleep.Most sleep experts recommend steering clear of screens at least 2 hours before bedtime because your circadian rhythm is most sensitive to light during the evening hours. Blue light, in particular, is known to suppress levels of melatonin, the sleep hormone. This can make it challenging for you to fall asleep at a decent hour, and when you do, it might be far from restful.