I totally agree with this. I usually turn my monitor brightness down to the lowest setting (my work monitor has been set this way for years). I've done the A/

I totally agree with this. I usually turn my monitor brightness down to the lowest setting (my work monitor has been set this way for years). I've done the A/B testing on myself and find that I will develop something like a mild headache (probably eye strain) after a day of working at the default brightness. On my old LCD monitor the brightness would reset if power got disconnected so I did the experiment several times accidentally. My current monitor (Dell U3014) remembers the setting across power resets. I have my brightness control set to zero. It looks dim at first but after a few minutes it looks completely normal and you forget about it.