KA-NL300 is a new type of energy saving motion sensor lamp; The light become brighter and service time longer, When reached a certain degree of illumination, it adopts PIR technology to sense motion and turn on the light automatically; It can identify day and night automatically, at night when one enters its detection field, the lamp will shine and after leaves it will go out automatically. If you want the light to remain on for an extended period of time, just slide the switch to the "ON" setting to turn the light on and keep it on, until you turn the switch off.