Flashlights and Batteries and Candles

Just thinking about light for my house when power is compromised. I was thinking candles for constant light however they can be messy. What about lanterns with smokeless oil? That seems a good alternative. Any suggestions or thoughts?

As far as flashlights, there are so many. Suggestions, I see a lot on Amazon with CREE LED's.

What is best to keep in mind as far as power source? meaning CR123 or some other battery? Is there one rechargeable that is better than another and how long will it hold a chare without being used? Don't want to get caught with no power. Maybe some dry cells as a back-up?