>>1258196thanks for that suggestion, those are pretty great actually, but not perfect. the diameter is 3.25cm which probably will fit but it'll be tight, dunno if it'll affect the way the candle feeds or not. also I crunched the numbers on the 15hr version (including shipping $ to Aus on all of my calculation) and those candles come to just over $0.04 per cubic cm of wax, compared to just over $0.05 for the UCO candles. obviously both can be improved by buying in bulk. so the price is a only little better, but comes with the real problem is energy output. like with tea lights that burn a small amount of wax for 4-5 hours, for these to burn for 15hrs the wick must be tiny and the light and energy output will be tiny.
so, definitely worth it for just aesthetic cozy lantern burning, not worth it if you you need the light or heat production.