bright
bright is a command line utility that adjusts your screen brightness. This is particularly useful when you want to lower the screen brightness below what you can adjust with the hardware.
Usage: bright <value>
value is an integer between 0 and 255. 128 is the default value. Running bright without any paramenters resets the brightness to the default value.
License: freeware and can be used for personal or commercial use. It comes with no warranty or support. Use at your own risk.