Start by cutting around 50 lengths of wire, and begin wrapping the edges of a few pieces of wire around the base of a candle to form a spiral that will hold the candle in place. Make as many spirals as you like depending on how many candles you would like your tree to hold. Twist the remaining pieces of wire together to form tree branches, and then wrap all the wires together to form your tree trunk leaving around three or four inches at the end to make the tree roots.
DIY: Wired Tea Light Holder : from Remodelista - Simply twist coated wire (jewelry supplies any craft store) using pliers around a tea light. Be sure to use tea lights with a base to prevent wax drips and fire hazards.