how to set light on windows (from option dont work)

[tremback]

how i can set the lighting of the game???
from the option dont work!!!

[ULTRA Random ViruS]

Press Tilde [`/~] on your keyboard, and type the followong:

Code Select Expand

/r_gamma 1.5
And press "Enter"
Try alt-tabbing in/out or putting fullscreen off/on if that doesn't work.