... car closer and closer(5-10meters, adjustable), auto-sensor receive signal and transmit to let light fully work at 18W, equals to ... 3. Low decay below 3% in 10,000 hours service. 4. All LEDs light up immediately, even switch on/off often ... controlled T8, avoid air machine, automobile horn, ambient temperature interruption. 4. Applications:Parking lot, basement, elevator, passageway, washroom, park,bus ...