Sengled LED Emergency Light Bulb with Built-in Rechargeable Battery, 3 Hours of Light in Power Outage, E26 Base A19 LED Light Bulb, 40W Equivalent POWER OUT, LIGHT ON! - Sengled Everbright LED Bulb integrates a rechargeable built-in Lithium-Ion battery, bulb will automatically activate in the event of a sudden power outage(Hurricane,Snowstorm) and will light for up to 3.5 hours. NOT ONLY BULB - The Everbright light bulb can be used as flashlight for home or outdoor, just hold the bulb socket with your hand and the bulb will switch on as flashlight. USE ANYWHERE INSIDE: This damp rated 40W equivalent LED bulb provides 500 lumens and is suitable for any area in the home, like living rooms, bathrooms and hallways. ENERGY EFFICIENT - Made of quality LED, the emergency light bulb uses 80% less energy than incandescents and last for 25,000 hours of use. What you get----A multi-function LED light bulb, welcome guide, one year warranty and friendly customer service.