Okay, done a bit of testing. T3.
1) Medium light bedroom, yellowish (power saving type): facing light bulb - 2nd level (what I estimate is 25% brightness). Facing away - 1st level (something like 6%). Neither m or n had this behavior, so Huge progress.
2) Outside, completely dark, yellow english lights (look up on internet or something, basically very yellow light). When walking street illuminated only by lights + cars: mostly 2nd level, sometimes switching to 3rd (which I estimate is 50%). Walking by brightly lit stores - 3rd level.
3) McDonalds (basically brightly lit room-cafe-shopping mall) - 3rd level.
Everything is great in terms of minimal brightness (I would even prefer a bit darker level 0, but I guess its a compromise). No complaints here.
Remark about 3rd level of brighness - I would say you could lower it a bit, make a bit more dark (can't remember the measurments you use, but I would say ideal is 10-20 lower).
And speed of brightness switching is also fine for me (pretty quick).
