1.The sensor head faced to Exit or Entrance 2.The lamp should be kept far away from which temperature is high and sensitive place. 3.Not put any big object around it.
Work principle: When you in sensor range, it works about 40 seconds. After 40 seconds, if you not move, the lamp not work. Too bright or in the day,the lamp doesn't work. It only works in dark environment or at night.
Trouble removal: Occasionally it can auto light up, may be there's animal moving or the install angle is not correct. The lamp is turned off every 40 seconds, and repeat it, you have to check whether a person or an animal moves, or take it to another room to check.