2-Pack, Dusk To Dawn/Day Night Sensor, Photoelectric Switch, Photo Cell Sensor, DUSK TO DAWN PHOTOCELL SENSOR SWITCH -- This photocell sensor switch will automatically turn on lights at dusk and off at dawn. No need for manual operation anymore. The delay feature in the outdoor light sensor prevents the accidental triggering off the light due to the headlights of a passing car or lightning. MULTI VOLTAGE SWIVEL PHOTOSENSOR -- Handles between 120V and 277V and compatible with LED, CFL, fluorescent, incandescent and other types of bulbs, so you can use this photoelectric switch sensor in most various occasions such as outdoor lighting, exterior lighting, street lighting, passage lighting, and doorway lighting. UL LISTED PHOTOCELL LIGHT SENSOR -- Covered with UL certificate, surge protection available, heavy-duty body, P65 Water-resistant, AC 120-277 input voltage, 50/60Hz, threaded diameter 1.06 inch, 5-20Lx on and 20-60Lx off operate level. EASY TO INSTALL -- With a swivel mount, this outdoor light controller can be easily installed it at a precise spot focusing light. Just disconnect power, place screw thread of the SWITCH in the knockout hole and fasten with rubber gasket and zinc alloy lock-nut. RELIABLE QUALITY AND SERVICE -- UL listed, 3 year warranty available. Please feel free to contact us for refund or replacement if you have any questions or quality problem about the outdoor photocell sensor. We will response within 24 working hours