I suspect that dark-mode-everywhere fans turn up their monitor brightness way too high and then complain about bright mode websites. On the other hand, people

I suspect that dark-mode-everywhere fans turn up their monitor brightness way too high and then complain about bright mode websites. On the other hand, people accustomed to using bright mode turn down their monitor brightness and have no issues. As a rule, the white background should not be much brighter on a monitor than a piece of paper next to it. This often results in brightness settings between 15-20%.