Dusk to Dawn Photocell Light-The outdoor led wall pack light fixture comes with a built-in dusk to dawn photocell sensor, which can auto-on at sunset/night and auto-off at sunrise/day. The photocell sensor can adjust the lighting duration for your location and four seasons and help to reduce another extra 30% power compared to normal hand switching or timers control. Up to 85% Energy Saving Lights-The outside patio light has built-in high-performance LED chips, which can provide 1980LM brightness with only 18W. This porch lighting can effectively replace a 60-100W HPS/HID light by saving up to 85% energy. No hassle of replacing bulbs, saving you maintenance costs.