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Интересные, полезные ссылки на рессурсы по Би-Ксенону :)

http://www.auto-electronic.net/hidprojector.htm

http://members.misty.com/don/contxe.html

http://www.xevision.com/hid_pulsing.html

http://members.misty.com/don/spectra.html

http://members.misty.com/don/d2.html

http://members.misty.com/don/dschtech.html

http://www.xevision.com/hid_searchlights.html

High Intensity Discharge (HID) Bulbs:
How can an HID bulb work without a filament?
Its better to compare an automotive HID lamp with the well known fluoresent tube. Very simplistic, light is produced by sending current through metal vapor.

What is optical difference between an hid and an halogen light source?
Its obviuos that HID bulbs have the great properties of being brighter and whiter. An HID bulb dos NOT spread light like a generic light source that spreads equal light 360 degrees:

Yellow/orange sector. In a sector straight down from arc of the bulb, yellow/orange is higly visible. The direction will not change, even if bulb is rotated. In a OEM HID headlight, usage of this light sector is either totally blocked off, toned down and/or spread evenly into the rest of the beam so that headlamp output only have very minor or non yellow hotspots. How much this sector straight down from arc is utilized will directly affect the color that headlight emits.

Above: Simplified diagram of white versus yellow sectors.
Return wire shadow will always be present. However, if it faces down, it is within a toned down sector anyway (see regarding yellow sector above), so this should never be seen in the output from an OEM HID headlamp.


On all OEM HID headlamps that has been taken apart so far, return wire have been facing down. When it comes to aftermarked HID kits, return wire can face up, others down. Other directions than straigth up and straight down has not been spotted. For more info on return wire and kits, see "What makes a HID kit worth buying" section.

How even is the color and intensity across the arc (the light source)?
The ends of the arc has almost double the intensity and bluest color. Which means that optical engineers can make headlamp output bluer (or more yellow) than the bulb output color is, without using color filters (like they do in photograpy). For HID retrofitting in halogen headlamps, this a feature that cannot be utilized. Its pretty obvious that a chromed reflector cannot be reshaped in any way. So a unlucky retrofitter CAN end up with color spectrum from brown to bright white - in different places of the beam.
What is color shift?
The labled light color on an HID bulb is an average that it will maintain over 2-3000 hours. After passing around 100-500 hours the phenonmen "color shift" will take place. Color will change slightly from a yellowish tone to a crisper bluer tone. The magnitude of color shift will vary depending on brand, model and rated color. It is a very gradual change and unless paid close attention to, a customer might not notice. OEM 4100K Bulbs manufactured by Philips has been reported to have a more noticeable color shift than OEM 4100K Osram. OEM 4100K Bulbs manufactured by Philips has a colorshift of approx 250K after 500 hours, which will bring it to up to 4350K.

Asian manufactured bulbs has been reported to have little or no color shift. Most of them come with output stealing blue filters, which may be part of the cause.

Why does a replacement bulb look yellow?
Its very rare that a high quality (Osram, Philips, GE) HID bulb break, but if it does happen it would be a normal thing purchase same brand and model. It is a normal thing that a replacement bulb of same brand and model will look more yellow. Up until now, dealers have told custmers that there is not much to do about it, unless both bulbs are
To be in front of the marked, Philips introduced the "Plus" range of HID bulbs, to have a product that will not look yellow in a situation like this. See own section for the Philips 5000K bulbs.
How do I measure what color (in Kelvin) my bulbs are?
Many HID bulb resellers claim a certain color or Kelvin rating. Many times these bulbs is not the Kelvin rating they are supposed to have. The manufacturer know that the customer will never be able to measure this anyway. You can stare at the coating or salt micture for decades, but it will still end up being homebrew guestimates. It would require advanced measuring equipment worth several thousand dollars. Many customers buys HID kits second hand and needs spare bulbs. Unless part number listed on bulb, you are more or less traceing back a dead end. Resellers of HID kits comes and goes and manufacturers are changing specs faster than you change underwear. Both Osram and Philips have P/N listed on bulbs, detailed specs are released on the web, and they stand behind their claim of lifetime.
Does HID bulbs need to be color matched?
Yes. Always get a matched pair. This means they must have the same:
manufacturer
part number
use time (if bought second hand)
Exceptions from this will show smaller or bigger differences in color, output and size of hotspot.
Why can HID lamps be dangerous?
A blast from a crushed 100 bar hot HID bulb will send glass pieces into your skin and eyes and potentially fill wounds with mercury, which is very poisiness. Room will be filled with toxic fumes. Very high startup voltages can give you electric shock if closer than 1.5 inches or 4 cm. A headlight assembly will protect you from all this included UV rays.
Why is HID lights totally blue for a few seconds after startup?
Due to the extreme complexity, this question has been condensed in to a MS Word document contributed by Ekooke, JustHitADeerWithHID, H1HID, and Mr.108
HID Phenomenon Document

What does D2R and D2S mean?
It may sound like some non meaningful letter combination, but there is actually a meaning to the madness:

D2S: Discharge second generation shielded
D2R: Discharge second generation reflection

What is the difference between D2R and D2S?
The main difference is the U-shaped masking on the D2R that blocks out unpredictable light in certain directions. Also, the base has different notches. Name of base is P32-d2 for D2S and P32-d3 for D2R. D2R was developed so that Mercedes could still use their reflector based headlights in the mid 1990s. They did not want use projectors like BMW. A glare box inside the headlight could have been used to accomplish a straight line, but a mask painted on the bulb was cheaper to make and had better precision. Other (near) luxury cars (Lexus, Infinity and Acura) followed Mercedes and equipped their cars with D2R bulbs in reflector based headlamps. Using a D2R in anything else than a OEM HID headlight designed for the D2R bulb makes no sense. It will only reduce output. Some HID kits comes with D2R bulbs. Some amateur kit designers will even claim that D2R genrally reduces glare in a retrofit. This is nonsense. The D2R bulb masking is around 3-4 a'clock and 8-9 o'clock when bulb is in right position. Those are not the (only) sectors that creates glare.
As an example, here is the data on Philips 2 versions:
D2S: 3200lm, 4250K, 91lm/W, 35W
D2R: 2800lm, 4150K, 80lm/W, 35W

Above from left, D2R and D2S. Note that Philips does not make blue painted HID bulbs. The appearant blue color is just background.

What is the difference between D2S and D1S?


D1S is a further developed D2S, to increase safety and elimnate the need to mount ballast inside or onto headlamp. The base of a D1S bulb has ignitor built in, eliminating the need to transfer 23kV through a cable. The Less components that can be harmed by mechanial impact, the safer it is. D1S is part of Philips "XenStart" system - see "HID Ballast" page for more info.

D1S is basically a D2S, where base is "cut halfway off" and a black box is mounted to the base. Which means D1S does not have any higher output. D1S system is backwords compatible. A D2S bulb can be mounted into a D1S socket of a OEM HID headlamp. When mounting a D1S into a D2S socket, you will see that bulbs seats great because mating base are identical. Its the securing part that can be questionable. Deep securing rings will not go under the ignitor box. An OEM HID headlamp designed for D1S typically use a spring clip to secure HID bulb. The spring rate is much higher than in traditional halogen system, mainly because of higher weight and need for more safety. A D2S bulb will m

The connector on D1S is different as well. Voltage from ballast is only around 85V, so extreme high voltage plugs are not needed.

D1R differ the same way from D1S as D2R differs from D2S. For more details on Osram D1S, see this offsite link.

What does the P/N on Philips bulbs mean?
Legend:
OEM=Original Manufacturer Equipment
aftermarked=sold as spare bulbs or manufacturer of kit
Bulb base: P32-d

85122: D2S. Color is bluer white with slight greenish tone.
85122+: D2S CM (Plus). 5000K. Aftermarked only. Ment to pair up with used 85122. Released Q4, 2002.
85122WX: D2S Ultinon. Aftermarked only. Released Dec 2001. Ultinons label on bulb were later relabled to " Philips BL-2 Non automotive use"
85123: D2S. Color is bluer white with slight purple tone. Not officially on Philips product list. Nevertheless, it is found in some BMW OEM HID headlamps. Click here for a color comparison to 85122.
85407: D1S. Integrated ignitor.
85407+: D1S CM (Plus). Integrated ignitor. Aftermarked only. Ment to pair up with used 85407. Released Q4, 2002.
85126: D2R.
85126+: D2R CM (Plus). 5000K. Aftermarked only. Ment to pair up with used 85126. Released Q4, 2002.
85126WX: D2R. Ultinon. Aftermarked only. Released Dec 2001.
85408: D1R. Integrated ignitor.
85408+: D1R CM (Plus). Integrated ignitor. Aftermarked only. Ment to pair up with used 85408. Released Q4, 2002.

"CM" means color match.
There is a 4 letter date code following, which looks like this: L029, C024 etc. What they mean is probably not very useful unless you do warranty work for Philips.

Who is OE manufacturer of HID bulbs?
Philips and Osram are the ones widely used in cars in North America/Europe. (GE is still trying to get their feet into car manufacturers budget.) They come with standard 4100K color temperature only. This is the only legal HID bulb color temperatire under DOT/ECE regulations. Many projector headlights in upscale vehicles may look like they have higher Kelvin rating, but that is an optical effect. See Section for projector units for more details.

What is the difference between Philips and Osram HID bulbs?
Philips bulbs is slightly whiter than Osram. The amount of lumens are the same. Osrams seems to be softer on the eye. (Its proven that a lower amount of blue and higher amount of yellow irretates eyes less). Philips has the excact opposite, slightly more blue, slightly less yellow, so they appear more colder white.

Does Philips or Osram make HID bulbs with halogen base?
Non of the OE companies manufacturers HID bulbs with any halogen type base. This would be an illegal product to sell and use on the street. OE companies value safe products higher than making some quick money now and lawsuits later. The only base they produce is P32-d that will fit into socket of a OEM HID headlamp. As an example, any seller who claims to have a 9006 Philips HID bulb is a scam. This is confusing marketing. At the best, all the seller can offer is a 9006 rebased Philips OEM HID bulb. More information on HID kits are found here.

Warranty on HID bulbs
Bulbs bought as HID kits or bulbs used in a Halogen headlamps are not covered. Some kit manufacturers use Philips bulbs as parts of their kits and sell with 5 years warranty. Only HID bulbs sold with a car are warranted from Philips. That leaves the retailer or the kit manufacturer as warrant. It is very doubtful that you will obtain that.

What decreases life of HID bulbs
Most of us have played around with halogen bulbs and found out that the only thing that really decreases life is over voltage and high G-forces. HID bulbs are more frigile:

Probably the number one reason is lamps running with non approved ballast. It does not matter how good the lamp is if the ballast characteristics are not OK the lamp will die prematurely.
Turning bulb on and off without neccesary cooldown. Turning it on more than 3 times an hour seems to reduce life according to datasheet.
Burning in the wrong position or plane. This creates over heating both of the internal components in the lamp but also at the pinch. The biggest failure across lamps as a whole is airleak. In the HID lamp you have very high pressure and temperature, if these are direct wrongly to the pinch the lamp will fail. Both Philips and Osram recommends horisontal (+/- 10 degrees) burn positioning.
Handling. They are a delicate product which have not been designed to be handled. They are very much fit and forget. You can risk damage either to the burner or to the UV shield or both. This damage can be either physical or by contact depositing oils and acids from your skin on the glass.
Headlight housing not according to specs of the D2 bulb. Bulb vibrations caused by loose retaining mechanism, or bulb getting too warm simply because housing is too small and do not get adequete cooling.
How to recognize the real Philips Ultinon HID bulb from a clone?
There are several indications. One of them is that they are only made in Aachen, Germany. They are not made or made under license anywhere else. The rest of the properties are shown in this picture. It shows the D2S version of it. Rebased bulb might lack the text on the base. Custom base will lack the entire base. The remaining properties will still be valid.

The hard facts on 4100K Philips HID bulb:
It is shown in product catalogs as "MPXL-DL35". MPXL stands for Micro Power Xenon Light. This is the bulb installed OE in many HID headlamps today.
It is 3200lm bright (+/-450lm) and 4100K colortemp (0.380x 0.390y).
At zero hours it starts off at 4100K and goes upwards to 4600K after 1500 hours. After that there is no measure points, but curve has the direction to reach 5000K after maybe 2500hours.
Do not rush out and buy some 5 year old bulb from an old BMW 750iA yet; As all other bulbs, they also get dimmer with time:
100% at 0 hours
90% ar 200 hours
80% at 1000 hours
75% at 1500 hours
70% at 2000 hours

Chances that a bulb gets as old as 2000h is not likely. 2000h of driving in 70km/h (~50mph) is a pretty long distance: 140000km (~90000miles). Chances that most cars see some form of front accident that will break the bulbs are pretty high.
There is no reason to jump any conclusion that they loose lumen too fast. I would be surprised if any other lamp can do better. An halogen lamp is usually out of service after 5-600 on graphs like this. Asian HID bulbs has repuation for 5-600 hours of life as well.

The hard facts on 4100K Osram HID bulb:
They are labeled "Osram Xenarc" and comes installed as OE bulb on many HID headlamp equipped cars.
"Xenarc standard" datsheet: Offsite link to Osram website

The hard facts on 4100K General Electric (GE) HID bulb:
They have marketwise been more in the shadow, compared to other HID manufacturers. They have not been spotted anywhere else than as replacement bulbs at a dealer. This not an indication of quality, probably more of an indication of price. A GE D2S bulb is listed 3200lm and 4100K.
"Arcstream" Datasheet1: Offsite link1 to GE's website
"Xensation" Datasheet2: Offsite link2 to GE's website

The hard facts on Philips 6000K Ultinon:
Marketing names: "Ultinon", "Cool Power" and "Cool White" are all the same D2 lamps.
The Ultinon and standard lamps are identical with the visible exception of the 'salts' colour in the burner and the ceramic insulation on the earth return lead. Base is labeled: "Not legal for use in Europe/USA". This bulb is clearly ment for the Asia/Japanese marked - they do not have the strict regulations when it comes to color. Some aftermarked vendors market Ultinon as a brighter bulb than a standard D2. This is not true:
OEM Philips D2S is 3200lm bright (+/-450lm) and 4100K colortemp (0.380x 0.390y). (For comparison)
Philips Ultinon D2S is 2400lm bright (+/-250lm) and 5800K colortemp (0.327X 0.312Y).




The hard facts on 5000K Philips:
Marketing name is currently "Plus". Production started up mid Sept 2002. This will cover the demand for a bulb that will have the same colortemp as an OEM bulb on a 2-4 year old car, without losing any real performance. Typical use would be for replacing bulb on a high end car with more than 1000 hours of use, so that color is matched better than a new OEM bulb. Base will be labled "ECE". These bulbs should be attractive for OEM dealers.
OEM Philips D2S is 3200lm bright (+/-450lm) and 4100K colortemp (0.380x 0.390y). (For comparison)
Philips 5000K D2S is 3100lm bright (+/-???lm) and 5000K colortemp.




What are D3S and D4S type HID bulbs?
D3x and D4x are mercury free versions of the D1x and D2x light sources. They do not work with older D1x/D2x type ballasts because steady on voltage is only 36 V. Compare that to a D1x/D2x style, and u will see that voltage is 85 V. In detail, 42 +/- 9 V can be measured at a D3x/D4x bulb. They have same output, same life as D1x/D2x bulbs

How does arc look like when bulb is off?
Obviesly the arc disappears when power is turned off. The metal salts will then turn into powder and will fill 1/8 of the bottom of the round glass capsule in the middle of hid bulb. The color of these salts are grey/ green on Philips and Osram 4100K. Philips 6000K has a deep red color, which can be mistaken to be blood. The color of the salt will remain until bulb is turned on again.

Below: Philips D2S. The salts have fallen down towards return wire. Salts have turned into solids. Bulb in picture below was burning with return wire down. It was then turned almost upside down. That is why the salts are pointing upwards.


Osram Sylvania and blue HID bulbs
Osram Sylvania has an HID bulb with higher color temperature as well. They call it D-HC (Discharge-High Color) HID, with 5400K and 2600lm bright and has an integrated starter in the bulb base. It is used in their X1010 Aux low beam kit. Their standard HID capsule has 4100K and is 3200lm bright.

6000K, 7000K, 15000K HID bulb scam
Many people said, "oh no, not another blue bulb!", and thought that the blue low quality bulb "scam" finally spread over to hit the real HID market in late 2001. Philips Ultinons made in Germany have equal quality, like the OEM Philips bulb, so you cant really call that product a scam.
There are other blue HID bulbs made other places in the world that can be scam products. They maybe even have the Philips or Osram name on the box, or the base, but bulbs are made or modified by someone else. Equal bulbs can also be markeded to have different color temperature. Most customers would never know if color temp was was off, as long as they are matched as a pair. Some kit and bulb suppliers advertise with 7000K and higher. This can be suspective because a lower than OEM quality bulb can have been used. No bulb OEM manufacturer makes any versions with more than ~6000K. So either it is 6000K, or the bulb might have been painted. Painting bulbs decreases brightness and in most cases decreases life. So be aware what you are buying.
As an example, look at table below, and see how blue a 9000K bulb will be! Would you honestly want it to be as blue as the sky?

Yellow:
1500 k Candlelight
2700-2900 k Yellow painted fog halogen bulbs
-------------------------------
Yellowish white:
3200 k Sunrise/sunset
3200 k Premium H7 non painted halogen bulb
3400 k 1 hour from dusk/dawn
-------------------------------
White:
4100 k Philips/Osram OEM HID D2S
5500 k Bright sunny daylight around noon
----------------
Blueish white
5500-5600 k Electronic photo flash
6000 k Philips Ultinon HID D2S
6500-7500 k Overcast sky
-----------------
Blue:
9000-12000 k Blue sky
-----------------
Purple:
28000 Northern sky
12000-30000 k Ultra Violet light (black light)
---------------------------------

Above table is based on the ancient Kelvin (K) colortemp defined along time ago. Before we knew that was electro magnetic waves. At that time we only knew the temperature something had when burning. As an example, a candle light burns at around 1500K (see table above) or 2100F (Fahrenheit) or 1200C (Celsius).

Interesting! So what is actually white light?
Now that you know that light is electro magnetic waves, imagine that each base color (blue, green, yellow and red) has each wave length. White light is a balanced mix of all of them. Here is the window that are visible with human eyes:

720nm infra red - heat radiation (invisible)
660nm red
610nm yellow
550nm green
460nm blue
420nm black light
400nm ultra violet (invisible)

1nm = 0.000000001 meter

What are the results of using 6000K, 7000K, 15000K HID bulbs?
Stage 1 refers to 4100K and stage 2 normally refers to something higher value K.
As an example, a 6000K bulb in some headlamps might not show much difference at all, others will look more blue. These are observations when standing in front of the car looking into the headlights from above. After getting over the initial thrill of cooler light, many drivers have noticed that important traffic information are not as appearant as with OEM standard bulb. White traffic signs is being lit too much and can feel glaring.
During winter 2002, exponensional use of Kelvin (K) rating is used as brightness improving advertisement. Its all just big empty words. Do a search for "kelvin color temperature" on a search engine (ie: yahoo.com) and you will see that it has nothing to do with brightness and all to do with color. Going upwards from 4100K means that your light turns blue at the expense of total brightness and yellow color. Theoretically, if the same brightness were to be kept, you would have to increase the wattage of the bulb from 35 to maybe 40W, and redesign the ballast. This would be a very costly solution, so thats pretty much why all automotive HID bulbs are 35W.


The importance of spacing for return wire on D2 bulb
If the return wire (on the bulb) electrically hits headlight reflector, you can risk your ballast. The igniting mechanism in ballasts are relatively frigile and start voltage can decrease from the rated 23kV. That means that it will not be aurn wire and the metal. (Notice that even plastic reflectors are considered an electrical conductor. They are chromed.) You can get away with a close distance if area is very small. But it might give unpredictable results. Its the same with lighting froime.

Where can I buy original P32-d based HID bulbs from?
Philips: autolamps-online.com, suvlights.com or car dealer.
Osram: suvlights.com or car dealer.

Whether u purchase from suvlights.com or autolamps-online.com is a matter of personal preference. Postage is minimal from both places - they only weigh like 40-60 grams or something each.

What other wattages than 35W HID bulbs does exist?
There is a 17W HID bulb used for diving flashlights. It does appearantly lack some of the good features and/or qualities compared to a Philips/Osram HID 35W bulb.
The main developer of automotive HID bulbs, Philips, has a 50W HID bulb (Product name: MPXL-DL50) and supporting ballast readily developed. Per fall 2002, there was no automatic shutdown on these ballasts. Output is around 5300lm. Inserting this bulb into a vehicle lamp designed for the 35W HID bulb gives more some more output, but its not a huge difference.
The bulb base is not much difference from P32-d base used in 35W HID bulb base. Colortemp is 3900K which creates a CRI of 75, which is excellent. Life expectancy is around 3000hours at ideal condiations.
The availability of MPXL-DL50 has been special order only up until 2004. Some boxes of 10 were sold on ebay fall 2004. Be prepare to order in larger quantities if interested. When/if Philips gets more success in selling the centralized lighting concept (based on fibre optical wires), the MPXL-DL50 will remain an oddity.

What does bulb input voltage do to performance??
Todays hid bulbs are designed to operate at ~85 volts after igniting. Increasing voltage increases output, decreases color temperature, increases current and decreases life. An example of a ballast currently on the marked that can deliver more volts is the german built Auserwald ballast. (Distrubuted in the US by Kenrad Lighting, Oregon). It has separate output terminals labled "50W" where increased voltage is present. (It also has output terminals labled 35W).
Hidkits.com has a variable output ballast, that can decrease output voltage from 85V. This will make output dimmer and bluer. Their ballasts is an in house design, and many has reported it to have a questionable design and finish in year 2000/2001.

How do I convert A D2R bulb to an almost D2S?
How do I make a blue bulb clear?
D2R and blucoated bulbs are less bright than a clear D2S. The coating can physically be removed.
Get a 3M Auto-Pak WetorDry Automotive Sandpaper (Walmart) (it has 220, 320, 400, and 600 grit paper) and i bought 3M 1500 grit paper. 3M rubbing compound is great to remove 1500 grit scratches. Also, use masking tape to cover the base of the bulb and the end of the bulb so water and any foregin parts do not get anywhere they do not belong.

1. Sand the ceramic paint of the D2R off with 400 grit sandpaper. Be careful and dont rub too hard and dont expect to get it all off right away. Patience and a steady hand is key.

2. Then use the 600 grit to go over the areas where the ceramic paint is/was. Do not sand any place that did not have the old ceramic D2R paint.

3. Next, use the 1500 grit paper and go back over the areas again. This is the longest part. This is the part that you can repeat. Do not repeat the above steps. The paper in the above steps will just make the scratches worse. I used a very little drop of water on the sandpaper and rubbed the D2R while it was wet. This helped alot. After, the first time using the 1500 grit dry, repeat with 1500 grit wet. After you feel that you cant do anymore or that you are making it worse, then proceed to the next step

4. Use a very small amount of the Rubbing compound and spread it using a clean cotton terry cloth. Just put enough to make a thin layer over the areas where the stripe was. To remove the rubbing compound use a clean terry cloth. To remove any film and to clean it in general, use isopropyl alcohol and a sterile natural cotton swab(better to use) oran it in general, use isopropyl alcohol and a sterile natural cotton swab(better to use) or a q-tip.

5. The last step, which i didnt do but others have, is to take a dremel and attach a cotton polisher. Dont turn it up much at elp alot. I didnt do this step. My bulb looked scratched after i was done and was extremely worried. BUt when i put it into to my projector along side the my other projector which had a regular D2S, the beam pattern and brightness were the same. So even if the bulb still looks terribly scratched dont worry aobut it b/c there is NO WAY that you can get it to look like the rest of the bulb. Just stay in the areas where the ceramic paint is and you will be fine. Dont scratch up anywhere else.

As for the bases of the D2S and D2R...they are ALMOST identical except that the notches are on opposite sides. However, to fix this problem it literally took me 30 seconds to fix. I found where the notch on the D2R needed to be fit my D2S housing, and took a triangular file and filed away; 30 seconds and problem fixed. The hardest part was figuring out which size file I needed. I got a pretty small one and made a notch just big enough for the housing's notch to fit.

In total, you have to weigh how much time you want to put into this against price of new D2S bulbs.

How do I fix a broken return wire insulator?
HID bulb return wire is covered with a thin ceramic tube and is therefor brittle. HID bulbs are frigile, they cannot be handled as much as halogen bulbs. The most common reason for broken insulator is after using HID bulbs in a halogen housing. It may sound awkward, what is really the difference you may wonder. Fact is that halogen headlights have a much smaller diameter hole compared to an OEM headlight. An OEM headlight typically has an opening of about 25mm (1 inch). So if you buy HID equipment and insulator is broken about 30% of way from the base, well then seller has not been aware that bulb must be HANDLED WITH CARE when inserting/removing.

Life of bulb will be reduced if insulator broken. The intention of the insulator is to stop high voltage arcs during startup directly from inner wire to return wire. Such archs will eventually kill bulb. Rapairing it is probably not worth the effort. There is not really any material that will stop high voltage from arcing besides ceramic. If you are able to place special rinsed clay onto wire, then burn it a 1000C oven, it be great for wire but not HID bulb. Return wire could be cut, a new insulator could be attached (not available on the marked), then return wire could be welded back together. This would require a small scale welder - not very common tool to have.
Conclusion: Broken return wire equals defective bulb



What brands of HID bulbs is NOT world class
Many sellers nowadays offers several brands with different price tag. Typically, HID bulbs desgined and manufactured in simple facilities will have lower quality. Most of these bulbs are made Asia. Typical signs of lower quality is non existing data sheets. The marked also has many copycats: Packaging and bulb labled Philips or Osram exists on the marked. Be sceptical if a brand name bulb is too cheap to be true. Consumers reports life to be short (less than 600 hours) and dim output.
Here is a list of bulbs in this category:

Vestec
bulbs in kits sold by Misterjung.com
bulbs in kits sold under "Bohmen"
Where can I ask questions?
Please visit the online forum. There are plenty of people that have automotive lighting as a hobby and are willing to help you.

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Copyright 2001-2004 Automotive Lighting FAQ


14.03.2010 10:55
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