What Blue Light Is and How it Affects Health

Blue light is responsible for the color of the sky. Shutterstock.

2. Natural Blue Light

Because blue light wavelengths are so commonplace and can come from different sources, there is a difference between those that are emitted naturally and those that are from an artificial source. 

It is this process that makes our eyes and mind process a blue sky. Blue light has also been proven to boost alertness, elevate moods, heighten reaction time and increase an overall sense of well being, among others.