First, I hope you didn't take my friendly teasing about being a Tarsier the wrong way! I was just making a little (very little) joke!
That actually sounds like a good idea. I think we all get too used to computer screens being flashlight-bright, and it does cause eyestrain after awhile.
One question: When you set it that way, do you turn on the Ambient Light sensing, or not? And if so, how well do you feel that it "tracks" the environmental light level? And if not, do you find you have to "chase" the brightness setting to compensate for ambient light level changes, or do you just leave it alone and accept some degree of "mismatch"?