Now these days blue light rays has been become a big problem for cell phone users. It’s very harmful and
dangerous for human life.
Blue light rays produced by your own cell phone or other devices which has display screen. ** you don’t have permission to see this link **
is the main cause of poor sleep.
You cannot sleep better and
you will always feel lack of relaxation in the morning after wake-up.
So, you must save yourself
from blue light rays to be fit and healthy.