'Automatic Light Strobe' is a freeware screensaver add-on to existing screensavers that 'strobes' the Num Lock, Caps Lock and Scroll Lock keyboard LED's on and off to give a nice effect, especially in the dark! alStrobe is freeware and is compatible with almost all screensavers available! alStrobe does not replace your current screensaver, but instead adds more effect to it by 'strobing' lights on the keyboard when your normal screensaver runs.