This is a pair of intelligent LED emergency lightbulbs, each one a 7-watt LED bulb (light output about equivalent to a 40-60 watt incandescent bulb) and screws into a standard USA light socket. During a power failure, it keeps burning, thanks to an intelligent blackout circuit and an internal Lithium Ion rechargable 18650 battery. On power outage, it shifts to a slightly lower output and continues to illuminate for probably 3-4 hours, keeping your family from sitting in the dark while looking for your emergency lanterns.
Note: I would have given them 5 stars if they included the switched emergency bases that showed in the listing pictures. That was a little misleading. However, considering the price (about 10 bucks for a pair of bulbs), it was still a bargain
https://www.amazon.com/gp/product/B07C23L8GH #SkidooMarink #Zondeals #Review #SKM