I have half a dozen of the NuWick 44 Hour Candles along with several boxes of hardware store "Emergency Candles" (5/8" dia x 6.5" long). The NuWick's seem to do everything that they claim, although I've not burned one down completely to know the true burn time.

I also keep a couple of dozen thermonuclear tealights handy, as they do throw off a surprising amount of light. With regard to traditional tealights, I much prefer the Pheylonian Beeswax Survival Candles as they burn much longer and do not produce the black, sooty deposits that paraffin-based candles do.

Jim