I really just don't understand this pushback. I posted a comment about eye strain. I've been using computers for almost 30 years. Do you really think I haven't tried turning down the brightness? Is it that hard to believe that there are people out there that sincerely, legitimately, prefer light-on-dark text (possibly due to physiological differences in the eyes or brain)? Why this need to "correct" people? Just let people do what works for them!
(If you meant your comment to be "I found this works for me: ..." or "Have you tried ...?", then write it that way. The imperative mood is off-putting.)
FWIW: On my laptop, which I use most of the time these days, I adjust the brightness continually, probably 20+ times a day, and keep it pretty low. (I buy Thinkpads partly because their minimum brightness is so low.) On my desktop monitor, which is more annoying to adjust, I actually keep it at 0 most of the time, and bump it to 35 when the sun is out.