dual vs single filament (7440/7443)

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02-06-2010, 11:03 AM

snaik69

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dual vs single filament (7440/7443)

whats the difference (besides the obvious (1 vs 2 filaments)...i want to get the full chrome turn signal bulb but i see both of these mentioned on this site....did search but found no explanation...

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02-06-2010, 11:37 AM

beerme986

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dual filament means the bulb has 2 filaments so that one can act as a parking light and one be a turn signal (or think of it as a bulb that can be low beam and high beam). there is no benefit to it unless your housing requires it.