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If the exhaust from a candle (think small, like a tea light) can be made to travel upward through the tube, and the exterior of the flashlight given sufficient heatsinking, it's possible that this arrangement can yield more visible light than the candle can produce.

I'd have to work through numbers to guess, and do the experiment to be sure...




Here's the productized version of that idea: http://www.thepowerpot.com/

The consensus of the camping community seems to be that it's not worth it. Batteries + camping stove is easier/cheaper.




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