I light candles pretty much every day/night. As a child my mum lit candles often at mass, I got into that way, I’d light a candle to Our Lady or the Sacred Heart, then kneel before the statue and pray. Seem the statues were looking at me. watching me.
I used to imagine that when candles are blown out, the smoke from the candle was taking the prayers up to heaven, ha, I sometimes think this now and also when a priest uses incense.
As an adult I don’t light candles at church anymore, but I do so at home when I pray for someone or an important issue. Mostly at night, just seems to always help when I do.