You can now buy a one-light set of birthday candles which are like normal candles all joined together with a strip of paper connecting all the wicks. You stick them in the cake light one end and the flame runs all the way along the chain lighting all the candles on the way.
It was blurdy fantastic and beats burning your fingers off furiously trying to light all the candles which wax drips all over the cake
Got them from Sainsburys!