4 per pack, built-in photocell turns on the light automatically and enters "Dim" mode at dusk and turns it off at dawn * Built-in motion detector automatically switches from "Dim" to "Bright" when motion is detected, and switches back to "Dim" if no more motion is detected in approximately 30 seconds * Self-powered by high-efficiency solar panel, ideal for outdoor paths, patios, porches, decks, driveways, sidewalks, entrances, sheds and other remote areas * Energy-efficient, long-life, super-bright white 16-LED solar light with built-in rechargeable Li-ion battery * Easy, fast, convenient & hassle-free installation, mounting anchors and screws included