Bonfire; why? I shall explain (in great & unnecessary detail).
A candle is an object made to sustain a flame; it is also one of the smallest objects designed to sustain a flame. The reason "bonfire" is the word I associate it with, is because of two reasons:
A bonfire is also an object designed to sustain a flame for a significant period of time.
While a bonfire could be classified as the same as a candle in it's function, in a way it is the complete opposite. While a candle is a small object meant to sustain a small flame, a bonfire in a large object meant to sustain a significantly larger flame than that of a candle.
Of course, there are many other objects meant to sustain flame, & those that can but were not designed to; however, I did not choose any of them. I am supposed to give the word that I associate it with, & that is the one that I have chosen.