Rechargeable emergency light bulbs with battery backup, working as normal bulbs, and can charge itself when daily use ,be preparded for emergency, TFOI rechargeable battery bulb has 3 duration options,2-3 hours/7-8 hours/14+ hours. When connected to the mains, 6-8 hours fully charged, 100%/50%/10% Brightness is adjustable, use different brightness in different places.10% for bedroom, 50% for bathroom, 100% for living room,You can replace your current bulb in any room, storage, basement, hallway, barn etc. Rechargeable light bulbs are a necessity for household during blackout, storm, hurricane. With this light bulb, you don’t need to pay on extra lighting equipment for emergency. Get prepared with emergency lights for home power failure, and say good bye to extra candles, flashlights and lanterns. These rechargeable light bulbs are screw in as ordinary LED bulbs (E27/E26). Each light comes with a holder hook, perfect for outdoor activity like camping.You can carry them into a dark room during a storm, just walking through the house, or hang it anywhere you like. Save you from the frustration of finding flashlight/candles in the dark. 800-850 lumens with low energy cost. 12W LED light bulbs 80W Equivalent to save at least 80% energy and electricity cost. No radiation, No extra electricity cost, 100% environmental friendly. Last but not least, life-long replacement and 24/7 customer service are at your service. Illuminate your space with these versatile LED light bulbs designed for both home and outdoor activities. These 12W bulbs feature an E27/E26 base and provide bright white illumination perfect for any room. The battery-operated design offers a practical solution during power outages, making them invaluable for emergency lighting. Each package includes 4 bulbs with a compact size of 1x1x1 inches, making them easy to store and transport. The 3-way feature allows for flexible lighting options to suit your needs. These cordless, rechargeable bulbs eliminate the hassle of traditional wiring, while the durable plastic construction ensures longevity. Operating at 110V when plugged in, these bulbs seamlessly transition to battery power when needed. Whether you're camping, dealing with unexpected power failures, or simply need lighting in areas without electrical outlets, these innovative LED bulbs provide a reliable lighting solution.