In the dark or dim circumstance ( ambient illumination ≤ 2lux ), this LED sensor light will turn on automatically if someone moves within its sensitive area, and will keep on lighting for 30 ~ 60 seconds after the move stops. When it turns off, there maintains dim background light. Voltage: AC 110V-120V 50Hz 5W. Luminous flux: 160 lumen ( equal to 25W incandescent lamp ). Sensitive wide angle: 90o. Sensitive distance: 4 - 5 m. Light emission wide Angle: 30o - 160o. Maintain time period: about 45 seconds/time. Sound sensitivity: 65dB (sound sensor lamp). Suitable for corridor, doorway, washing room, cloakroom, ware, basement, garage, and so on.