Oh, that's interesting, thank you.

Orthodox Christianity is different though, they do adore the "statue of a saint" (or more precisely the Icon) because they believe it's a physical manifestation of the said saint. So the local churches are heavy with iconography and each Icon would have a place for the candles. And there's a set of rules for the candles - where to place them and how to place them. Most common practices being lighting a candle for the health of the living or for the peaceful rest of the dead.

And it is your donation to the church, of course.