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HID bulbs in Halogen Projector

Old 04-24-2012, 08:37 PM
Mazda3UR's Avatar
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Join Date: Mar 2012
Location: Northeast PA
Posts: 91
Default HID bulbs in Halogen Projector

I've been asked quite a few times "can I just swap my halogen bulbs for HID bulbs in my projector headlights?"
Yes and no
Yes it can be done BUT:
because a halogen projector is ment for halogen bulbs the focus is thrown off when HID bulbs are swapped in to the housing.
Here are a few photos using a mazda 3 halogen projector.
First one below is a stock halogen h11 bulb
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Notice it has a nice clean cut off right around the step? (when I say step ___/--)
Now below is one of my 5000k H11 HID bulbs
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If you look at the cut off area around the step you can now see that it is blurred. This is because the focus point of a halogen projector is different from HID projectors.
The reply I get is yea, so what I never get flashed it not as bad as plug and play in non projectors.
Well the blurr that is around that cut off is now glare that blinds oncoming traffic. I am sure you have seen other people running plug and play HID and have been blinded, well you are now doing the same thing.
Just in case you have a hard time with the 5000k photo
Below is a 3000k h11 bulb I also sell. I put it in the same halogen projector. This helps bring out the extra fuzzyness that the cut off now has compaired to the halogen bulb. not much of a clean cut off.
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Just for reference:
below is a 5000k bulb in a HID projector designed for HIDs.
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Old 04-27-2012, 09:04 AM
Join Date: Dec 2011
Location: Canada
Posts: 2,636

A good site: (3") Mazda 3 - Clear Lenses from The Retrofit Source Inc
I am not totally pleased with my Mazda 6 Low beams. I changed bulbs and did re-aim them, still not really satisfied but don't like reliabilty of HID lights.
Also found this pic, OE lens is opaque, TRS is clear;
Attached Thumbnails HID bulbs in Halogen Projector-projectorlensheadlight.jpg  
Old 04-28-2012, 04:49 AM
virgin1's Avatar
Super Moderator
Join Date: Mar 2007
Location: Manor, TX (Outside of Austin)
Posts: 8,660

I think you mean translucent (frosted, in this case,) not opaque.
Opaque= no light transmission.
Translucent= light passes but not unabated
Transparent= all light is transmitted
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