In light of what is going on in Japan I have been thinking more about emergency preparedness and what my family would do if the power was out for an extended period of time. Anyways I came across these oil floaty candles on Hobbylobby.com. (My local store does not sell them and I had to order them online.) You take a small glass dish with water, add vegetable oil on top, and then add the plastic floater with wick....let the wick soak up the oil, and then light it. From what I have read one bottle of vegetable oil is supposed to burn 1000 hours! The wicks do not burn up as long as there is oil in the dish. Once the oil is all used up the water will fill up the valley parts and smother the candle.
The candle gives off as much light as a votive candle. So, just enough light to keep you from stubbing your toe. Or if you light a couple it could be romantic.