A unity candle symbolises the very essence of the wedding ceremony.
Usually two taper candles, representing the couple as individuals, are used to light a single centre candle as a visible symbol of their commitment to each other. There are many variations on the ceremony and the individual details are completely up to you. A candle ceremony is usually incorporated into the body of the ceremony, a ceremony within a ceremony if you like.
It tends to appeal to couples seeking a striking visual, ritual aspect for the service. It does require practice and some planning – especially if you are planning an outdoor wedding when consideration must be given to weather.