... go approach such sensor LED light within 5 meters , switch be in “Auto” position on sensor , It be triggered and switch on LEDS automatically ,when people ... :when you come in,the light will light up,and off when leaving.no need of turning on and off frequently. 4.if no electricity ... places in car. 8.fixed in walkway,corridor,stairs,basement.no need 220v matched wire.it is on when people come,off when ...