Inexpensive original spare parts. The ORIGINAL signal lamps with a glass wedge base are available as original spare parts for different types of lamps. Discover these reliable and proven high-quality lamps from OSRAM. ECE category: W21W Bulb type: Auxiliary Socket (standard designation): W3x16d ELECTRICAL DATA Power input: 25 W Rated voltage: 12.0 V Rated power: 21.00 W Power input tolerance: ±6% Test voltage : 13.5 V PHOTOMETRIC DATA Luminous flux: 460 lm Luminous flux tolerance: ±15 % DURATION / LIFE Duration B3: 400 h Useful life Tc: 600 h