These things are incredible. I used to turn it on for my eyes, but i noticed that when on my laptop in bed, without it on, i wont feel tired at all. I turn nightshift on and suddenly i feel sleepy :)
Not only that, try to switch it on and off a couple of times. You'll see that when the blue light is ON after having used the blue filter for like a couple of seconds, you'll feel like someone punching your eyes!
It's almost like having a lamp in your face all the time in the night - of course you can't sleep! We just got used to it. Now thankfully someone has implemented such filters.
