The process within the human body run by a circadian clock or circadian rhythm.
Sunlight activates daytime hormones and processes within the human body that allow us to be more active and focused during the day. Blue light has the same effect as sunlight.
The major sources of blue light we are exposed to today include indoor and outdoor lighting, television screens, computer and other electronic displays (eg, mobile phones and tablets), LEDs (eg, alarm clocks and small indicator lights).
As the sun sets in the evening this signals the body to wind down and relax, releasing melatonin (sleep hormone) preparing us for a proper night’s sleep.
Exposure to blue light after the sun has set disrupts the body’s circadian rhythm and causes an imbalance of daytime and nighttime hormones leading to poor quality sleep.
These three tools help reduce blue light exposure at night.