When making the adjustment, be sure to have the ambient light control dial in the fully CCW position. Also be sure that the lights have timed out automatically, prior to making any adjustment, and that the area is just at the point where artificial light is desired. Begin to turn the dial clockwise, slowly, until the sensor kicks in, and turns the lights on. At this point, the dial should not be adjusted further. If you find that the sensor is still behaving incorrectly, please feel free to call our support line at 800-824-3005 to speak with a Leviton representative. We are open weekdays from 8am-7pm, EST.