the.com/brightness
the slider everyone cranks down at 3am and back up by noon.
unitmeasured in nits, named from Latin for shining
sun's outputabout 1.6 billion nits at the surface
phone limitsscreens hit 2000+ nits to beat sunlight
perception trickeyes judge brightness by contrast, not absolutes
star scalemagnitude runs backward, brighter means lower numbers