The Birdie Spare Incandescent Lamp is the illuminant to be used with the Birdie pendant lamp. It is a special illuminant Ingo Maurer has produced especially for his lamps. The Birdie Spare Incandescent Lamp is a low-voltage lamp with 24 volts and wattage of 10 watt. The glass of this illuminant is kept matt in order to provide for a dazzle-free lighting.