What is so wrong with blue light? Why do people say blue light is bad for us? Where does this blue light come from?
In nature the sun provides a complete spectrum of light frequencies, emitting all the colours of the rainbow including blue light. The big deal with natural sunlight is that the different light frequencies are balanced with each other and not isolated
Now take your computer screen, that is a very different story. The light being emitted from your screen is very heavy on the blue and the other colour frequencies needed to provide balance are lacking, especially the red. Red light is the major balancer for blue light. You could imagine this like comparing natural sunlight to your phone screen is like comparing a whole natural food with a processed food. Butter or margarine, what would you choose?