The picture looks brighter then it does to you because the camera can use a longer exposure time. But that is for another forum. There isn't much you can do to make it brighter. The safest way is to do what I did and remove the touch screen. It helps slightly but mainly helped with the glare and fuzziness. If you can't live without the touch screen, then this won't help of course.
The brightness is from the CCFL tubes behind the LCD. Running the monitor at a slightly higher input voltage will make it slightly brighter but is not recommended unless you want to buy a new monitor soon. Putting in a backlight with more or brighter CCFL tubes would be nice but I haven't seen anything better then what is already in there.