SnapPower StormLight When and if your power goes out, StormLight's built-in battery backup activates additional extra-bright LED safety lighting. The battery will provide light for up to 6 hours during a blackout. DUSK-TO-DAWN SENSOR - The StormLight will provide a soft downlight, similar to the GuideLight, while your home is powered normally. LTKWatchNow LTKGiftGuide LTKHome