Energy saving: Powered by sunlight, saving your electricity bill. Light Sensor: Turn on the lamp, it will come to the AUTO mode, ligh up at night and go out in daytime autoumatically. No need to hand control. Wide use: The lamp can illuminate the dark space outdoor, for example, you will never miss your keyhole when go home. Waterproof: Designed for different weather, can work well in sunny day, rainy day and small snowy day. Easy to install: Comes with full accessories, easy to assemble and install.