The Insta Bulbs they sell on the TV infomercials are also good to have. They are battery powered (keep fresh AA batteries on hand) and can be moved from room to room or placed in their holders to make them stationary light sources. Though they don’t give as much light as regular light bulbs, they are safer than lanterns or candles.
Batteries are costly, and just don't last. When we are in our cellar, we have to have the flashlights, we use a battery operated FAN, portable TV, Radio, lots of batteries. Then I have to make sure I take the batteries out and store them, and hope they work the next time I need them. lol
So I will be getting some of those garden variety Solar Lights now.