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Prudent RVer Info on
Incandescent Bulbs Using the Wedge 9.5mm Base

The W9-series 9mm wedge-base miniature incandescent bulb numbers are 922, 921, 912, 906 and 194. The base is all glass, nominally measuring 9.5mm by 2.1mm. The bulb measures 15mm in diameter and is nominally 1.5 inches long. The following generic information comes from donsbulbs.com

Bulb volts amps watts design life lumens length uses
906 13.0 0.69 8.97 1000 hrs 1.49 in patio lamp
912 12.8 1.0 12.8 1000 hrs 1.49 in ceiling lamp
921 12.0 1.33 16.0 1000 hrs 1.49 in ceiling lamp
922 12.8 0.98 12.5   200 hrs 1.49 in auto lamp