Why we want to build a ceiling lamp with motion sensor? When you come back at night and stand in front of your door looking for keys, would you prefer a light that turns itself on? When your wife is carrying clothes with basket and walk into the laundry room, would you prefer a light that turns itself on? When your parents go upstairs/downstairs at night, would you prefer a light that turns itself on up over there? And so many more... Why radar sensor instead of infra-red? Comparing with infra-red, radar sensor is more sensitive, responsive and reliable. The light turns itself right on when you need it. Comparing with infra-red, radar sensor works great in hot weather because it's based on motion detection instead of temperature like infra-red does. Is radar sensor perfect? Radar detection may go through windows/doors/walls, sometimes it's over sensitive so you better make sure it's big enough where you install it. Motion Activated& Light Sensor 16w 10 inch 1600lumen 5000K motion sensor ceiling light will work from dusk to dawn, hardwired power source, 30,000 hours Life span, Motion sensor ceiling light has low power consumption, save up to 80% on your electricity bill. The light fixture's LED Driver senses both daylight & ambient light as well as motion. If the lighting fixture is installed in a dark room, it will illuminate by motion, and shut off after your chosen light-after motion-setting. If it senses there is enough light for someone to see, then the sensor will shut off the driver. Lighting Timer Adjustable&Detection Range Adjustable Our motion sensor flush mount ceiling light has a cool high-quality design, bright and tasteful look, create a comfortable lighting environment. Lighting Timer Adjustable Motion sensor ceiling light has the lighting timer (3s-3min) adjustable function, just rotate the knob to choose your ideal lighting timer. Motion Detection Range Adjustable Motion sensor light has the detection range(1-9m) adjustable function, you can rotate the knob the detection range you like. Easy Installation The light fixtures is designed to be compatible with housings in your room. You can use the screws of any housing to install the lamp in less than 5 minutes together with the push-in wire connectors. Acrylic Dome The dome of the lamp is made of acrylic which has good transparency for light to pass and eliminate those sharp lights that hurt your eyes. It is very soft and definitely won't crack when you accidently drop it. Brushed Nickel The light fixture is made of brushed nickel which looks very nice and decent built. It's only 10 inch in diameter but gives off tons of lighting because it's LED. And for sure you don't need extra bulbs to make it work.