The original question was about using candles along with mirrors. I don't think the Catholic church does that.
Just using candles alone in a religious service, I wouldn't have a problem at all with that. Look at all the weddings we have where candles are nearly always used.
Meddle Not In the Affairs of Dragons; for You Are Crunchy and Taste Good with Ketchup.
I am so clever that sometimes I donít understand a single word of what I am saying. Oscar Wilde