> " I doubt the flashlights would work well, if at all, at room temperature"
I found it a bit disappointing that they mentioned one use case as finding candles when the power is out, shortly after mentioning that it works only marginally at 50 degrees F. It takes quite a while for a normally-heated house to drop to that temperature.
It's a neat invention, no doubt, but the practical use cases for this particular version are going to be outdoors.
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...
I found it a bit disappointing that they mentioned one use case as finding candles when the power is out, shortly after mentioning that it works only marginally at 50 degrees F. It takes quite a while for a normally-heated house to drop to that temperature.
It's a neat invention, no doubt, but the practical use cases for this particular version are going to be outdoors.