[stinos]

For me 100% brightness is way too much when inside even during the day. Maybe the monitors I have are exceptionally bright to start with, which I doubt, but whenever I get new monitors I usually put them down to about 30-40% for usage during the day. Which is the level which to me makes it looks as if white on the screen roughly matches a white wall in a similar location in the room. This just feels the most natural and least fatiguing, probably because looking at the screen or surroundings hardly changes pupil size. Which I confirmed with a research-grade eyetracker.