Mr Beams MB260 ReadyBright Wireless Power Outage LED Lighting System - Standard House Kit (includes 2 Path Lights and 2 Ceiling lights + Detector) Automatically detects a power failure and provides up to 40 hours of bright light Simple wireless installation-no electrician needed Light can be controlled by the remote for maximum safety, convenience and battery life Power Outage Detector is a remote and a flashlight Auto shut off if no one is home