NOTE: Instruction of Motion modes via remote control Step1: turn the green button “ON” Step2: press the “M/ON” button to turn the motion detection on, then it will be in motion modes Specification 1.Sensitivity: Around 18ft Distance 2. Sensor Range: About 120 Degrees 3. LED Qty: 58 white light + 60 warm white 4. Light Color: Warm White; Cool White 5. Delay Time: 20s~30s 6. LED Life: 50,000 Hours 7. Size: 20*19.5*7cm 8. Material: ABS + LED 9. Weight: 411g 10. Battery Required: 4pcs D-cell alkaline batteries (batteries not including) 11. Ceiling Light Color: Black Package Contents 1 x PIR Motion Sensor Light 1 x User Manual 4 x Screw + 4 anchors 2 Modes Available: There is a switch nearby the motion sensor, slide the switch to turn on/shut off the photocell sensor. When it is ON, the light will keep off under daytime and only could be motivated when it detects movement from up to 6m away in dark environments. When it is OFF, the light could be motivated on all day long. Battery Powered Night Light: Built-in PIR infrared motion detector, this LED ceiling light instantly turns on when it detects motion from up to 18ft away under dark ambient. And it turns off automatically after 20 seconds when no motion detected, conserving battery life. If the battery is put into the ceiling light, but the ceiling lamp still cannot be activated. Please check these. Please Confirm that the D battery is new Please Confirm that the battery installation polarity is correct Please Check whether the lighting mode of the ceiling lamp is the sensing mode (the ceiling lamp can only be lit in the dark environment in the sensing mode) LIGHTESS wireless ceiling light IP64 Waterproof ideal for stairway, hallway, laundry, basement, warehouse, etc.