light bulb question

507 Views 8 Replies 7 Participants Last post by RENZO1200, Nov 30, 2001

1.8t caracterized

Discussion Starter · Nov 28, 2001

I have seen a few cars with light bulbs that change colours. If you look at it straight, it's yellow and on an angle it becomes white. I don't know if this is the housing or the light bulb itself. If someone knows please tell me if there is this kind of bulb and where to buy it!!!!

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soundzero

· #2 · Nov 28, 2001

Re: light bulb question (1.8t caracterized)

Audi uses projector light housing. As I understand they use prizm like reflector which seperates lights by wavelength. So by some angle you will see white, and other angle you will see yellow.
I might be wrong on this.

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1.8t caracterized

Discussion Starter · #3 · Nov 29, 2001

Re: light bulb question (1.8t caracterized)

I mean aftermarket light bulbs. see some in headlights and foglights that change colour!

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bastos1.8t

· #4 · Nov 29, 2001

Re: light bulb question (1.8t caracterized)

I don't think we can get those bulbs for our car. Maybe for the fog lights. Generally they are the cheaper bulbs you can buy at wallmart but the are 9004's. The the guy above is right, it realy depends on the reflector (requires some sort of bent glass (projector style) infront of the bulb to get the different colors). That's why I said it may work for the fogs.

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user name unknown

· #5 · Nov 29, 2001

Re: light bulb question (1.8t caracterized)

they are called "plasma" bulbs.

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1.8t caracterized

Discussion Starter · #6 · Nov 30, 2001

Re: light bulb question (user name unknown)

Where can I get them?

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Danny`

· #7 · Nov 30, 2001

Re: light bulb question (user name unknown)

err, Plasma?
Naw, if the light "changes" color at different angles, it is probably one of those "ion" bulbs. Those bulbs were the first generation bulbs that people thought were "cool" until they got pulled over because of the rainbow look.
LOL.
Anyway, "Plasma","Super Plasma", etc. are used to describe those all too popular blue bulbs. (Avoid Hiper, Nokya etc. Really crappy stuff.)
You could probably get those ion bulbs almost anywhere .. try http://www.autoindulgence.com/ I'm not sure which ones they are, but they are probably the "ION GOLD" bulbs .. I don't think you want them though, because they are easy to spot by cops. Possibly getting a ticket or so.

Personally, I like the "changing color" effect, but the cops like to go after people with these bulbs.
Hope this helped
Dan

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LSinLV

· #8 · Nov 30, 2001

Re: light bulb question (Danny`)

FYI - You right, but it's not just the bulb/filament/gas in the bulbs that project that light.
What you see is a light wavelength shift from the lens system used in the Projector headlight systems. It's call "dichroic" lenses. By using a set of lenses to focus both the high and low beams, and the shape/faceting of the lenses, they throw different wavelengths of light at different angles of light projection.
Though you guys might like the "Mr. Science" info.

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RENZO1200

· #9 · Nov 30, 2001

Re: light bulb question (1.8t caracterized)

The only thing that comes close to what you're describing are the Osram Diadem bulbs made by Phillips. They'll change colors when off,,,but blink amber.
http://www.pgperformance.com/main.htm

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