The FSSP Traditional Latin Mass parish near me has a rule (stated in their bulletin) that candles brought by parishioners to be blessed on this day must be at least 51 percent Beeswax. You leave the candle off in advance with your name on it, so they will reject any candle that doesn’t meet the standard.
The relative handful of OF parishes around here that bless candles have no restrictions on candle types or materials, and I suspect many people will take those white votives with pictures of saints that every Walmart and Hispanic grocery around here sells. Most churches in the dioceses where I attend do not bless candles on Candlemas, many of them don’t even mention Candlemas in the bulletins. I’m not sure why. Perhaps they think it takes the focus off the Presentation of Our Lord.
I’m glad you have an OF parish that does a nice candle blessing. As I said, despite attending a plethora of parishes, I have only seen nice candle blessings at the Cathedral, the Czestochowa shrine, the Ukrainian cathedral, and the FSSP parish. Some of the other parishes have occasionally done things more like what DLee said. I will be attending an OF later for Flame of Love feast day and they will be blessing candles, but I’m not sure how they will go about it as this is a special Mass for the devotional group.