The unity candle
One of most well known side ceremonies in the wedding. It is usually done with 2 taper candles and 1 large candle. The tapers are lit before the ceremony, sometimes by the mother's of the bride and groom. During the ceremony the bride and groom take the tapers and light the middle candle signifying 2 people becoming one family unit. Sometimes other candles can be lit in honor of children in the family. A unity candle in an outdoor ceremony can sometimes be a challenge. A tea light in a votive holder to be lit can be put on the table in case the wind blows out the tapers.
A blown out candle in no way reflects on the future of the marriage.