i personally use the power control widget to adjust brightness. Unless i'm outside, i'm at lowest settings.
14% normal, with the BW widget to bump up to 100% when outside.
Moto Droid Rooted and OC'D, SPRecovery, BB V.6.1, Chevy's 1.1Ghz MV,
"You gotta perfect it before you package it" - Dion Sanders
By default, I'm at lowest brightness. When I need a brightness boost I turn up the brightness to 100% by pressing the camera button. All you have to do to do this is download this app: Button Shortcut - Android app on AppBrain and this app: FastBright - Android app on AppBrain then assign the FastBright app to the Camera Button using the Button Shortcut app.