What is the purpose of the black coating on the tips of headlight BULBS? - Ford Mustang Forums : Corral.net Mustang Forum
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Old 04-24-2005, 09:02 PM   #1
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Question What is the purpose of the black coating on the tips of headlight BULBS?

What is the purpose of the black coating on the tip of replacment headlight and foglight BULBS?

Can one use a similar bulb (same wattage, same connector), but without the black coating on the tip of the bulb without any adverse affects?

I know some Mustang head lamp (94 up) & fog lamp (79-current) assemblies already have a built in deflector which shields the frotn potion of thebulb, so why would the tip of the bulb be coated black?

Just wondering - never saw it discussed, so figured I'd ask...

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Old 04-24-2005, 09:31 PM   #2
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There is a reflector in the end of the bulb that sends the light back towards the reflector to give a more consistant pattern with even coverage without bright spots. I don't recommend anything other than a direct replacement.

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Old 04-24-2005, 09:52 PM   #3
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To reduce glare! Look at a car with 9005's, there bright as hell.
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