Mudder 12 Pack Emergency Rechargeable Light Bulbs Led Battery Backup, Charging Providing Prolonged Illumination: rechargeable light bulbs can be charged automatically in daily use, with a built in 1200mAh backup battery that lasts 4-5 hours, keeping your home lit during power outages; Simply screw our emergency light bulbs into the socket, and they are ready to use; It will charge automatically and when there is a power outage, you just need to keep the bulb wiring stable to keep it on Save the Energy: battery operated light bulb is equivalent to 80W ordinary light bulb, it uses energy efficient LED bulb, low cost, can be applied for a long time, which can save at least 80 percent of energy and cost Multifunctional Tools: the battery backup light bulb can be utilized not only as a regular light bulb, but also as a necessity and safety tool during power outages and hurricanes; These bulbs are equipped with power caps, hooks and switch, ideal for outdoor activities such as camping, hiking and fishing, lightweight and portable Widely Applicable: the battery powered light bulb is suitable for E27 bases and can be applied in any light fixture, such as floor lamps, table lamps and ceiling lights, can be widely utilized in garages, courtyards, hotels, offices, hospitals, schools, shopping malls, restaurants or other places that need long time lighting Sufficient to Meet Your Needs: you will receive 12 pieces of 15W emergency light bulbs and 12 pieces of portable power caps, 7000K white light, clear light source without flicker; You can use them in your home room, storage room, basement, hallway and warehouse