Command line brightness (Lion) Possible Duplicate:
  How can I dim the screen from Terminal?  




Is there a command I can execute to modify screen brightness? Interested to see if the min/max are hardware or software controlled, and what can be done for quick brightness changing without an apple keyboard.
I don't believe there is a built in way to adjust brightness in Terminal.app.  However, several people have written programs which can do this.  You'd need to download the code/copy it and compile the program so you can run the utility from Terminal.  Here's an example on mattdanger.net