> I seem to recall a thread awhile back about bulb life, and how
> automotive bulbs last longer than mains bulbs. I think that more than
> one person mentioned that the filament was thicker in an automotive
> bulb. I couldn't remember who, so I said "we" as in the list in general.

Automotive bulb fillaments are thicker mostly because the voltage is lower.
Therefore, higher current it needed for the same power.  The thicker
fillament allows for a longer bulb life.  This is the same reason that 220V
houshold bulbs don't last as long as 110V bulbs of the same wattage.


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