LED camping light bulbs

The power went out in our neighborhood for 24 hours earlier this week, but we had a lot of battery-powered LED lights. These bulb-shaped one are meant from camping, but you can hang them from chandeliers, curtain rods, hooks, etc. (I might make an adnapter with my 3D so they can screw into bulb sockets.) They use 3 AA batteries. They're on sale on Amazon: 2 for $8.