Not every colour of light is the same. The blue wavelength is great during the day as it increases attention, improves reaction times, and lifts mood but it is the most troublesome wavelength at night. Many of us are surrounded by screens everywhere, from the second we leave for work, school, in the car to the last minutes of awake time before (trying) to go to sleep. This makes blue light very difficult to escape.
Blue Light – Not Every Colour Of Light Is The Same