Bright lights in the morning will not only generate an alerting affect in the brain, but will also help to strengthen and shift our circadian rhythm making for a better sleep-wake cycle.
Although technology has many perks and advantages, it is important to be weary of how both environmental lighting conditions and the use of electronic devices in the evening can affect the timing and the quality of our sleep. Bright lights and screen time in the evening before bed have been shown to disrupt our circadian rhythm (our internal biological clock), including the production of melatonin, our night-time hormone. By reducing light exposure in the evening, our bodies will be able follow their natural pattern to transition from wake to sleep.
It is commonly mentioned to avoid bright lights and screen time before bed in order to achieve better sleep. This is because the eyes have a direct connection to the structure of the brain that regulates our circadian rhythm, our internal biological clock.