I found this interesting article that explains the truth behind Magic Candles used for birthday cakes! When you blow out a normal candle, you will see a thin ribbon of smoke rise up from the wick; while trick candles have fine flakes of the metal magnesium. Since it doesn't take too much heat to make magesium ignite (800° F or 430° C), but the magnesium itself burns white-hot and readily ignites the paraffin vapor, capable of being ignited by the relatively low temperature of the hot wick ember.
As I read this article, it came to my mind the last experiment that we did in our chemistri Lab class, since we also worked with Magnesium, remmembering it's bright appearance when it is heatted.
If you want to read more about this interesting article here is the link!
Nohora C. Duque