[quote="klaus"]I just heard that if you freeze your candles, they burn slower. It was on a feature about saving money.
Anybody heard of this? Does anyone do it, and does it work?[/quote]
The candle flame heats the nearby wax to melting, which is absorbed by the wick and burned to continue the cycle. I suppose with a frozen candle, the liquid wax may be kept at a lower temperature for awhile, which could result in a smaller flame. A smaller flame would be the only way to make the candle last longer. The effect would be temporary at best, and offset by the energy used to freeze the candle and opening the freezer twice.
Perhaps more economical is a "candle follower", which prevents a larger waste issue for stick candles -- dripping wax. Keeping the wick trimmed to the desired height will also control the flame size, and more controllably than the freezing method.
Check here. Churches have been dealing with candles for quite some time. :D