At what point do they melt? I've seen a high temp of 113 F in my life although we rarely get much over 100 F. The lowest I've seen is -38 F, although I doubt a candle minds being cold.

I think it's the bee's knees for using in power outages, etc at home. Probably nice for camping if I can suss out how warm it can get w/o melting.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman