921 Bulbs

The 921 light bulb is typically used for backup lights, and event interior illumination.  921 and 921LL can be used interchangeably.  The LL in 921LL stands for long life.  Bulb manufactures believe that you may be able to get twice the illumination out of a 921LL, so if you don’t want to replace it as often, the 921LL is the way to go.

Leave a Comment