As there a light-sensitive interior, switch simply allows the loose switch to be activated on in gloomy condition. So when you test the switch on ¡ ° auto ¡ ± function in a actual nacreous environment -LRB- close loose : > 5-10LUX -RRB-, It ¡ ¯ t work -LRB- Even movement sensed -RRB-. In this condition, Please do the detection area with your hand for about 30 seconds then test again. Specification stimulant : 110V/AC - 240V/AC Power Frequency : 50/60Hz Detection Range : 180 degree Detection Distance : 9m max -LRB- less than 24 ¡ ãC -RRB- close loose : Work in LUX less than 20LUX -LRB- switch on the `` Auto '' position -RRB- Time-Delay Min : 10sec -LRB- more or less -RRB- Max. : 30 min operative temperature : 20 ~ 40 ¡ ãC functioning Humidity : higher than 93 % RH Rated Load : 1200W/220v -LRB- light lamp -RRB- 300W/220V -LRB- energy-saving lamp -RRB- 800W/110V -LRB- light lamp -RRB- 800W/110V -LRB- light lamp -RRB- Power Consumption : 0.45 W -LRB- work -RRB- 0.1 W -LRB- atmospherics -RRB- Detection Motion Speed : 0.6 ~ 1.5 m/s Size : 70 mm * 115 mm * 35 mm Function : 1. The Motion sensing element works in the close friend less than 20LUX -LRB- sullen condition -RRB-. . . Time - delay is continually : When it receives the agreement in induction signals after the get-go induction, it will compute time once more on the rest of the get-go time-delay first -LRB- put time -RRB-. . . : `` ON '' `` OFF '' `` AUTO `` Attention : 1. Do n't to take aim sun friend or lighting, intemperate wind, draw near a heater or air condition. . . Do n't it at a place where there are obstructing substance -LRB- e.g. Glass, dim clothes -RRB- which IR can not get though. . . Do n't it in effective shock or vibration environment.