I've been using Brilliant Evolution - Wireless LED Motion Sensor Light 3 Pack for a few weeks now & enjoy them so very much! They're easy to install & very bright! The motion sensor automatically turns the light on. The light turns off after 30-seconds of no motion. Activates only during darkness to conserve battery life. Detects motion up to 10 ft. away. The light mounts with screws or adhesive tape (both are included). The light operates on 3 AA batteries (not included) and has a run time of over 100-hour. The run time is 4 times longer than other motion sensor lights.