Studies Show That Evening Light Levels Should Be Low For Sleep

Bright light during the nighttime is not ideal for sleep. Exposure to bright light at night can suppress melatonin, or natural hormones that help us feel sleepy. Some research suggests that using “night shift mode” may not reduce melatonin suppression. Thus, using backlit electronic devices are not guaranteed to prevent mobile device usage from disrupting sleep. Moreover, pre-sleep arousal, or high cognitive engagement before sleep, may contribute to poor sleep regardless of using night shift mode or other forms of blocking bright light.