General-purpose surface-mount LED light bars with built-in dimmers. On, off, and light intensity are controlled by motion over an infrared sensor in the light. Move your hand or finger across the sensor (within 1") to turn light on or off. The light turns on to the last intensity setting. While the light is on, hold your hand in front of the sensor to adjust light intensity. Maintain your position in front of the sensor to brighten or dim the light.