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Discussion Starter #1 (Edited)
Notwithstanding the long debates on here about the legal issues relating to HID kits, I'm a big fan of these kits and have had them fitted to all my cars for years now.

Therefore I thought I'd post a brief account of my experience in terms of bulb colours as I know this is often a common query from prospective buyers.

The most common colour bulb specified and indeed sold is 6000k which typically gives you a blue tint synomonous with Standard fit Xenons. However the actually colour depends on a couple of factors firstly the wattage of the ballasts / bulbs being either 35W or 55W the latter offering considerably more light output and without the bulb error messages. The 6000k 55W kits offer a brighter more OEM Xenon colouring than the 6000k 35W kits that are typically very blue and clearly stand out as aftermarket fitment.

The second factor is dependant on if you have a projector headlight unit or reflector, the projector units as fitted to the 159 greatly help to correct the light pattern that is slightly off as a result of using the incorrect bulb for the headlight design. However to clarify I've never encounted any issues with beam patterns on projector lenses. The projector lenses also help to give a slight blue tint to the light colour particularly at the edges of refraction.

Accordingly I've tried various colour combo's and have now just tried the new generation of 5000k 55W kits, which is now my prefered set up. The colour is very pure white with the slightest of blue hints, and is the closest to OEM colouring I've found to date. The 6000k kits are good and obviously Xenons but also clearly stand out as being aftermarket and to the trained eye, I for one can spot these kits a mile off.

However this latest 5000k 55W set up is spot on IMO and very close to OEM, the light output is immense albeit I have been running on standard Halogen bulbs for two weeks so the difference is probably exagerated. For those wondering the difference between standard halogen bulbs and 55w HID Kits is as clear as night and day. For a start I can actually see where I'm going in the dark now compared to the standard candle like set up.

For reference the 4300k colours are too yellow and just appear to be bright halogen bulbs so do not give the illusion of standard Xenon headlights. The 8000k bulbs and higher k colours are just for show and do not give the level of light as the lower colours plus the colour rendering is awful especially with the pinky / purple colours, I personally would avoid this.

So to summarise if you want a standard Xenon appearance in your 159 / Brera I'd suggest the 5000k 55W HID Kit's, The kit I've just purchased cost £38 inc P&P and is as good qaulity wise as the £200+ kits from suppliers such as HIDS4U (yes I've bought kits from here to enable me to jusitfy this statement).

I've not bothered with taking pictures as you can't really tell from pictures as to the actual colouring and the bright light distorts the camera image. Also to claify the above statement is based solely on my own personal experience of buying and fitting 30+ different kits on friends, family and my cars over the years.

This is kit I've just fitted in case anyone is interested...

http://www.ebay.co.uk/itm/170693609212?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
 

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They look a good kit, do the standard H7 burners fit ok in the 159 head lamps, I have an old 35w kit with H7r burners fitted at the moment
 

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5000K is too yellow for me...
I have 4300K HIDs and there is no way you could ever describe them as yellow.
They are white.
So strange you would think 5000K to be "too yellow".

The colour pics to show the various "K" HIDs on eBay are a joke though!
 

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I guess it is just relative. For me 6000K is getting close to being too blue, but 5000K is just too normal - not sufficiently different. 4300K relative to those to is like driving a Frenchman's car from the 1970s.
 

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Thanks for the info chris, i've just ordered a set :)
 

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I guess it is just relative. For me 6000K is getting close to being too blue, but 5000K is just too normal - not sufficiently different. 4300K relative to those to is like driving a Frenchman's car from the 1970s.
I haven't found that at all.
I changed from 6000K to 4300K not even a hint of yellow.
As I said, don't take any notice of the Photoshopped comparison pics on HID websites.

4300K produces the most usable light too.
 

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Thanks for the write up Chris :thumbs: I take it they aren't too difficult to fit?
 

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White light corresponds to approx 4300K, so a kit of that temperature producing 'yellow light' must be faulty. As stated above, the whiter the light (which doesn't mean blue-white) the more you can see. So if you want them to increase your own ability to see at night you need a set of that colour. Anything else is a) vanity, and b) more likely to dazzle other drivers as the higher the colour temp (ie shorter wavelength) the harder it is to focus the beam and aim it accurately.

Driving as I do, down country B-roads at night time, I am heartily sick of being blinded by oncoming cars!
 

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Good post, verrrry tempted.

Personally, I hate (passionately) very high temperature blue DIY HIDs in reflector lamps. It just looks rubbish and spoils everybody's evening.

The right colour in projectors is a different story... so this is very helpful guidance!

Question though - with the Alfa OEM HID kit (ie the "visibility pack"), what is used for the sidelights/foglights? Ordinary halogens/filament bulbs, or LED's/more HID's?
 

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Question though - with the Alfa OEM HID kit (ie the "visibility pack"), what is used for the sidelights/foglights? Ordinary halogens/filament bulbs, or LED's/more HID's?
Normal Halogen bulbs.
 

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Discussion Starter #13
Agree with most of postings above. 4300k is the purest white colour not yellow and emit most light output but when I fitted them they looked like very bright halogens not xenons.

At the end of the day it's all down to personal taste. My advice is def 55w not 35w and don't pay over the odds for expensive online hid specialists as they are typically the same as the cheap kits available
 

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At the end of the day it's all down to personal taste.
I rather think it's about safety :) With 6000k+ HIDs you will have a problem when driving in the rain or fog.
That's why all the cars come stock with 4200k bulbs.
Everytime when I see a pair of purple headlights (6000k or more), provided they don't blind me - because most of the times they are poorly fitted and halogen headlights are designed for scattering the light - I think to myself: "look, a chav diving an Audi". :cool:
 

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Chris,
Have you fitted them yet mate?
If so any pics available???
Because I am after a set myself for my 159

Cheers
Kev
 

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It's all about personal preference

The high the colour temp you go, the more blue the lights will appear, but the intensity of the light output is usually decreased also

Personally, i think 6000K is perfect, not too much light output is lost and they've got a lovely crisp white light with a nice blue tint to them
 

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Chris,
Have you fitted them yet mate?
If so any pics available???
Because I am after a set myself for my 159

Cheers
Kev
I'll be fitting my 5000k 55w ones this weekend. Will let u know how I get on.
 

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I rather think it's about safety :) With 6000k+ HIDs you will have a problem when driving in the rain or fog.
That's why all the cars come stock with 4200k bulbs.
Everytime when I see a pair of purple headlights (6000k or more), provided they don't blind me - because most of the times they are poorly fitted and halogen headlights are designed for scattering the light - I think to myself: "look, a chav diving an Audi". :cool:
Think you'll find that most new Audi's have 6000K as standard now, hense the bluer look to the xenon lights over earlier models with xenons
 
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