All Sorts of Factors (Score 1)

There's more than one reason we geeks like the dark. I prefer darker rooms - the darker the better. I notice that anything else makes my eyes and head start to hurt. I've had a computer for more than 20 years with better than 20/20 vision, and stare at a monitor for at least 10 hours a day. I also think the carpal tunnel thing is b/s and think more that keyboards aggravate an existing condition, not cause it.