This intelligent portable light bulb will illuminate and eliminate your power outage worries. The interior battery charges during regular use or light exposure, and its built-in power outage sensor will continue to shine up to 6 hours after an outage. With a 50,000 hour lifespan (that’s more than 5 years), this 12W LED is equivalent to a 100W halogen lamp, saving you 80% more energy than incandescent bulbs. You will be left saving power and saving yourself from worry.