Aftermarket HID kits. Watch this before you buy.. - Alfa Romeo Forum
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(Post Link) post #1 of 126 Old 24-11-08 Thread Starter
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Aftermarket HID kits. Watch this before you buy..

I found this on another forum with regard to aftermarket HID kits.

Xenon test | Video Features | Videos | Auto Express

I thought it may be of interest.

if that link no longer works, then the video is also embedded in this page.

http://www.danielsternlighting.com/t...nversions.html

Last edited by symon; 28-03-09 at 19:04. Reason: Add updated link.
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Re: Aftermarket HID kits. Watch this before you buy..

cheers...very interesting

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Re: Aftermarket HID kits. Watch this before you buy..

Quote:
Originally Posted by symonh2000 View Post
I found this on another forum with regard to aftermarket HID kits.

Xenon test | Video Features | Videos | Auto Express

I thought it may be of interest.
Very interesting, a few on here have them and had no problems
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Re: Aftermarket HID kits. Watch this before you buy..

I hate HID's with a passion there crap. And the extra light is that much really. It blinds the **** out of me.
 
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Re: Aftermarket HID kits. Watch this before you buy..

Well I think they look
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Re: Aftermarket HID kits. Watch this before you buy..

And that's the problem with people buying them, they buy them because they look cool more than they are functional. Crap things, why do you think Xenon lights cost so much from the factory?? They have specially made headlights for the bulbs to sit in etc.
 
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Re: Aftermarket HID kits. Watch this before you buy..

correctly adjusted headlights dont blind anyone
 
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Re: Aftermarket HID kits. Watch this before you buy..

Quote:
Originally Posted by hansthebear View Post
correctly adjusted headlights dont blind anyone
this is not completely true. fitting an HID conversion kit to a typical 'reflector' style halogen headlight can cause glare; if you try and direct the beam 'down' to minimise this, you'll probably have poor visibility! the problem relates to the change in 'focal length'; that is, the exact point along the globe where the light is emitted differs between a halogen globe and HID globe. this also relates to the orientation of the light source; in a halogen, the filament sits horizontally, left to right (east-west); in an HID globe, the 'arc' burns horizontally but forwards to backwards (north-south). as such, the beam pattern changes, and glare can result.

it is less of an issue with 'projector' style lenses. whilst cars like the 916 GTV and 155 have projector lenses, they were still designed for halogen globes. but if you fit HIDs to these cars/lenses, glare is much less of an issue compared with say a 147/156. regardless, the projector lenses in the GTV/155 are still not optimised for HID globes (but won't stop me from fitting HIDs to my 155!).

i'm no expert on this matter, but i do understand basic optics. so it is completely wrong to think that re-aiming a headlight can overcome glare in all cars.

anyway, this is all old news, surely. conversions have been discussed in these forums many times, and the same info is being rehashed here. however, the video is good to see, and will hopefully highlight the issues to more people.


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(Post Link) post #9 of 126 Old 25-11-08 Thread Starter
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Re: Aftermarket HID kits. Watch this before you buy..

Quote:
Originally Posted by Damien_C View Post
I hate HID's with a passion there crap. And the extra light is that much really. It blinds the **** out of me.
Totally agree. Aftermarket HID kits almost certainly invalidate your insurance too, unless you have a professional job with self levelling mechanisms etc...

Hopefully the police will start a crack down, as it is very dangerous being dazzled.
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Re: Aftermarket HID kits. Watch this before you buy..

Good vid, but who doesn't know this?
 
(Post Link) post #11 of 126 Old 25-11-08 Thread Starter
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Re: Aftermarket HID kits. Watch this before you buy..

The thing is Nev, although quite a lot of people know this through what people are saying on forums, it doesn't seem to make much difference.

Now that major organisations such as Auto express and the AA are saying it, people may actually listen.

If you see what I mean.
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Re: Aftermarket HID kits. Watch this before you buy..

Quote:
Originally Posted by shiny_car View Post
this is not completely true. fitting an HID conversion kit to a typical 'reflector' style halogen headlight can cause glare; if you try and direct the beam 'down' to minimise this, you'll probably have poor visibility! the problem relates to the change in 'focal length'; that is, the exact point along the globe where the light is emitted differs between a halogen globe and HID globe. this also relates to the orientation of the light source; in a halogen, the filament sits horizontally, left to right (east-west); in an HID globe, the 'arc' burns horizontally but forwards to backwards (north-south). as such, the beam pattern changes, and glare can result.

it is less of an issue with 'projector' style lenses. whilst cars like the 916 GTV and 155 have projector lenses, they were still designed for halogen globes. but if you fit HIDs to these cars/lenses, glare is much less of an issue compared with say a 147/156. regardless, the projector lenses in the GTV/155 are still not optimised for HID globes (but won't stop me from fitting HIDs to my 155!).

i'm no expert on this matter, but i do understand basic optics. so it is completely wrong to think that re-aiming a headlight can overcome glare in all cars.

anyway, this is all old news, surely. conversions have been discussed in these forums many times, and the same info is being rehashed here. however, the video is good to see, and will hopefully highlight the issues to more people.

Nice one for writing everything I was going to say

Quote:
Originally Posted by symonh2000 View Post
Totally agree. Aftermarket HID kits almost certainly invalidate your insurance too, unless you have a professional job with self levelling mechanisms etc...

Hopefully the police will start a crack down, as it is very dangerous being dazzled.

Yep, the insurance side of things is bad but them bloodly HID's wreck my brain. Some of the cheaper ones are complete crap. The only good HID's are the ones that come standard on the car. The M3 I was in tonight was great and no dazzling etc.
 
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Re: Aftermarket HID kits. Watch this before you buy..

Goos spot that Sy

I hate the aftermarket kits. It's like having a car with full beams on driving towards you

Ban them I say.

PS. Moved to Tuning & Upgrades as often discussed there but permanent link left in GAD
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Re: Aftermarket HID kits. Watch this before you buy..

I am constantly blinded by all the nobs in east london that have these fitted to their BMW's corsas and civic..
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Re: Aftermarket HID kits. Watch this before you buy..

Quote:
Originally Posted by Damien_C View Post
I hate HID's with a passion there crap. And the extra light is that much really. It blinds the **** out of me.
Quote:
Originally Posted by Squadrone Rosso View Post
Goos spot that Sy

I hate the aftermarket kits. It's like having a car with full beams on driving towards you

Ban them I say.

PS. Moved to Tuning & Upgrades as often discussed there but permanent link left in GAD
Of course you only notice the badly adjusted ones.
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(Post Link) post #16 of 126 Old 27-11-08 Thread Starter
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Re: Aftermarket HID kits. Watch this before you buy..

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Originally Posted by J2 GTV View Post
Of course you only notice the badly adjusted ones.
The point is even though they may be correctly adjusted, they still produce random glare. Part of the reason is that the lights are not designed for them. Lights designed for them usually have masks and levelling mechanisms to prevent glare. The filament on a normal bulb also sits across the reflector on a standard bulb. On a HID the Element sits lengthwise (fron to back) inside the headlight 90º from where the filament would be, which increases beam scatter.

They do increase the amount of light ouput and subsequent visibility for the driver of the car with HID's, however this is at the expense of everyone elses visibility.

Most of the Units I have seen that are CE marked also have fake CE markings.

http://en.wikipedia.org/wiki/CE_mark

CE can also mean "Chinese Export" if the spacing is not to official standards, and is deliberatly used to be misleading.

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Re: Aftermarket HID kits. Watch this before you buy..

Better off getting the "All-weather" bulbs from Halfords , they keep things legal and they are tons better than standard Halogen jobbies
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Re: Aftermarket HID kits. Watch this before you buy..

Correctly adjusted Phillips Extreme (+90&#37 are just about right I find. No need for conversion.
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(Post Link) post #19 of 126 Old 27-11-08 Thread Starter
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Re: Aftermarket HID kits. Watch this before you buy..

The philips Extreme power are the bulbs that I use as well.

They are essentially a very similar design normal halogen bulb in that meet the reglation power output, and sit inside the headlight unit in the same way as the standard bulbs, hence there is no problem with beam scatter.

Not totally sure how they work, but they are road legal and certainly a lot brighter than normal bulbs. I think the filament runs hotter which gives a brighter whiter light.
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Re: Aftermarket HID kits. Watch this before you buy..

thing is I know someone who is also a traffic officer that has aftermarket HIDs on his car and the beam passed MOT, he checked straight away after fitting to make sure they were legal and they were guess which car they were fitted to? a 156

because alfa use a projector type headlamp they are still well focused and follow the correct beam pattern
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Re: Aftermarket HID kits. Watch this before you buy..

oh and on another note, I find the cars that blind me most are the factory fit ones mainly in porsches
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Re: Aftermarket HID kits. Watch this before you buy..

Quote:
Originally Posted by symonh2000 View Post
The filament on a normal bulb also sits across the reflector on a standard bulb. On a HID the Element sits lengthwise (fron to back) inside the headlight 90º from where the filament would be, which increases beam scatter.
I don't know what bulbs you are thinking of, but H7, H4, H1 ALL have the filament running lengthways, not across.

H7
H4
H1
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Re: Aftermarket HID kits. Watch this before you buy..

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Originally Posted by explosive alfa View Post
thing is I know someone who is also a traffic officer that has aftermarket HIDs on his car and the beam passed MOT, he checked straight away after fitting to make sure they were legal and they were guess which car they were fitted to? a 156

because alfa use a projector type headlamp they are still well focused and follow the correct beam pattern
The 156 doesn't have projector type headlamps though buddy.
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Re: Aftermarket HID kits. Watch this before you buy..

no the 155 does and the GTV

but a police officer has them and they passed, nuff said
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Re: Aftermarket HID kits. Watch this before you buy..

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no the 155 does and the GTV

but a police officer has them and they passed, nuff said
I know that... but you were talking about a 156.
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