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Most incandescent bulbs have one filament. Some halogen bulbs working on 240 v have two filaments in series, which must be to simplify manufacture of bulbs being made for 120 v and 240 v in the same factory.

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10y ago

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How many bulbs in the tail light assembly are turn signals and how many remain brake lights?

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What causes the left tail light not to get brighter when braking even though both bulbs light up when the lights are turned on on a Dodge Stratus?

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