This is a CRT via composite: Brightness about 40
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And this one with Brightness: 25
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Problem is, this is a really low Brightness, even if I bump Contrast to ~80. There's one more variable in my telly (S-Bright), but overall I play with the brighter version on. It all depends on a game though: for example in this title (CAW) the low brightness is mostly fine, but in other, darker titles you will start losing details. It's also dead hard to calibrate properly, I'm not even sure if its possible, to have one profile for all games and systems.