Light Switcher is a great game to train your intelligence to the fullest. Switch off all the lights on a panel. It is not as easy as you think. The moment you switch off one light the one next to it switches off as well. If you get to the end of the game with one single light left, well you lose cause there is no pair light there to switch off both of them. Oh yeah, there is a time limit as well. So don't bother to try it if you are not ready for some brain twisting free downloadable games like Light Switcher.