The Journal Gazette reports on the impact of blue lights on sleeping habits.
The pervasive glow of electronic devices might be an impediment to a good night’s sleep.
That’s particularly noticeable now, when families are adjusting to early wake-up times for school. Teenagers can find it especially hard to get started in the morning.
As lamps switch off in teens’ bedrooms across America, the lights from their computer screens, smartphones and tablets often stay on throughout the night. These devices emit light of all colors, but it’s the blues in particular that pose a danger to sleep. Blue light is especially good at preventing the release of melatonin, a hormone associated with nighttime.
For nocturnal animals, it spurs activity. For daytime species such as humans, melatonin signals that it’s time to sleep.