You can conserve electricity and provide a lighted, safe environment at night by using the battery operated Motion-Sensor LED Spotlight. With a built in photocell, the LED is only activated in darkness, extending the life of your batteries. When the motion sensor picks up movement, a bright light will illuminate the area around it. For your convenience you can adjust the automatic shut-off time, level of brightness, rotation 360, and tilt it up or down. With the included mounting hardware, it can be mounted wherever you may need the motion activated LED to light up; the stairway, bathroom, hallway, kitchen, garage, front porch, back patio or shed. The Motion-Sensor LED Stair Light requires the use of three D batteries for power, sold separately.