Replacement bulbs for German candle arches Schwibbogen. This is the candlestick look that goes on top of the Candle Arch. Two Candlestick Bulbs to a pack. The bulb length is 2 1/2 inches long. The diameter of the bottom screw area is just about 3/8 inch and the entire shiny metal part on the bottom measures about 1/2 inch (including the protruding metal piece on the very bottom). 8V 3W From Germany.