Q:What exactly is the difference between GE158 and GE194 bulb?
A:The GE158 & GE194 bulbs are typically used in the instrument cluster.But they have different applications,the 194 bulbs are used for Instrument Panel Illumination,while the 158 bulbs are used for individual warning lights.
The on-line info tells us that the 194 bulbs have a longer life and slightly higher current consumption (0.27 vs 0.24), so the 194 bulbs are brighter as well).
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Top Light/ Reading Light