I have been trying out some oil lanterns and oil candles and have to say I'm impressed. They are a little dim, but considerably brighter than candles. In addition, I like being able to lug something around a lot more safely than candles.

Obviously I have flashlights, but I like having a bottle of lamp oil for a few dollars to give me days of light, inside.

I also have a propane lantern, that is extremely bright, but cannot be used inside.