Sorry if I gave the impression that was any way to stay warm. Was saying it is a way to stay alive, but it is nice to be warmer (than what the candle can do for you). I usually carry those plus other things, but the candles burn long and with a space blanket will keep your core where it needs to be.
I had a father that would wait until we hit a really cold night, then we would go out and sit in the car and go through what you do to not freeze to death. At the time I really didn't understand why we were sitting in the cold, when the house was right there. Though these days I wouldn't trade the memories of freezing my ass off with my dad for anything.