gurugugu

Hi, need help! I´m new with this, and I read a tutorial on how to flicker a light with a vibrate tag (rotation valuee) on a null object, and then linking the intensity of the light (or whatever) with the vibration/rotation of the null The problem is that the light flickers from almost no light to much light, I don´t know how to set, for example, the minimum intendity to 30% and the maximum to 45%. How could I do that? thanks in advance