Ettermonterte Xenon kits, får man mye trøbbel for det?

[spitz]

Jeg håper det oppklarer mer, og jeg håper du lar være å gå i detaljer og plukke ut èn enkel delsetning og fremstille den som en påstand fra min side.

 

Da har vi vært enige hele tiden - godt med en avklaring! Det var ikke så mye det at jeg plukket ut én delsetning, men jeg misforsto faktisk meningen i hele innlegget, og jeg går ut fra at det betyr at også flere kan misforstå. Derfor er det greit med en avklaring, og nå regner jeg med at alle er klare over hva som kreves for å få godkjent ettermontert xenon!

[pcp160]

Bra tråd, har selv vært litt usikker på hva som kreves utover dette med nivåregulering/vask. Har syntes det virker rart at man bare skulle kunne hive Xenon pærer i lykter konstruert for vanlige pærer, og jeg forstår da nå at man ikke kan det uten videre.

Et utdrag av aktuelle lovtekster hadde vært fint som en backup for påstandene, men det høres jo fornuftig ut det dere har kommet frem til syns jeg.

 

@Jonepet, litt velmenende kritikk:

Når man kommuniserer med andre, og disse tydeligvis ikke oppfatter det budskapet en forsøker å formidle, kan man se det på to måter;

1. De andre misforstår.

2. Jeg har uttrykt meg uklart.

 

I dette tilfellet må jeg bare få si til spitz forsvar at du formulerte deg veldig dårlig. Smak litt på de setningene dine en gang til, så tror jeg du ser dette selv.

 

"Nivåjustering og lyktespylere har, i motsetning til hva folk tror, NULL å si for hvorvidt det er godkjent."

"Det ENESTE som teller på hvorvidt det er lovlig er om akkurat den lykteserien du sitter med er godkjent"

[Magnum p.i.]

Har skumlest forskriftene fra Samferdselsdepartementet nå uten å finne noe fornuftig omkring xenonlys og ettermontering. Derimot har jeg kommet over en ganske interessant artikkel:

 

http://www.danielsternlighting.com/tech/bu...onversions.html

 

Halogen headlamps and HID headlamps require very different optics to produce a safe and effective—not to mention legal—beam pattern. How come? Because of the very different characteristics of the two kinds of light source.

 

A halogen bulb has a cylindrical light source: the glowing filament. The space immediately surrounding the cylinder of light is completely dark, and so the sharpest contrast between bright and dark is along the edges of the cylinder of light. The ends of the filament cylinder fade from bright to dark. An HID bulb, on the other hand, has a crescent-shaped light source -- the arc. It's crescent-shaped because as it passes through the space between the two electrodes, its heat causes it to try to rise. The space immediately surrounding the crescent of light glows in layers...the closer to the crescent of light, the brighter the glow. The ends of the arc crescent are the brightest points, and immediately beyond these points is completely dark, so the sharpest contrast between bright and dark is at the ends of the crescent of light.

 

When designing the optics (lens and/or reflector) for a lamp, the characteristics of the light source are the driving factor around which everything else must be engineered. If you go and change the light source, you've done the equivalent of putting on somebody else's eyeglasses: You can probably make them fit on your face OK, but you won't see properly.

 

 

Now, what about those "retrofit" jobs in which the beam cutoff still appears sharp? Don't be fooled; it's an error to judge a beam pattern solely by its cutoff. In many lamps, especially the projector types, the cutoff will remain the same regardless of what light source is behind it. Halogen bulb, HID capsule, cigarette lighter, firefly, hold it up to the sun—whatever. That's because of the way a projector lamp works. The cutoff is simply the projected image of a piece of metal running side-to-side behind the lens. Where the optics come in is in distributing the light under the cutoff. And, as with all other automotive lamps (and, in fact, all optical instruments), the optics are calculated based not just on where the light source is within the lamp (focal length) but also the specific photometric characteristics of the light source...which parts of it are brighter, which parts of it are darker, where the boundaries of the light source are, whether the boundaries are sharp or fuzzy, the shape of the light source, and so forth.

 

As if the optical mismatch weren't reason enough to drop the idea of "retrofitting" an HID bulb where a halogen one belongs—and it is!—there are even more reasons why not to do it. Here are some of them:

 

The only available arc capsules have a longitudinal arc (arc path runs front to back) on the axis of the bulb, but many popular halogen headlamp bulbs, such as 9004, 9007, H3 and H12, use a filament that is transverse (side-to-side) and/or offset (not on the axis of the bulb) central axis of the headlamp reflector). In this case, it is impossible even to roughly approximate the position and orientation of the filament with a "retrofit" HID capsule. Just because your headlamp might use an axial-filament bulb, though, doesn't mean you've jumped the hurdles—the laws of optical physics don't bend even for the cleverest marketing department, nor for the catchiest HID "retrofit" kit box.

 

 

The most dangerous part of the attempt to "retrofit" Xenon headlamps is that sometimes you get a deceptive and illusory "improvement" in the performance of the headlamp. The performance of the headlamp is perceived to be "better" because of the much higher level of foreground lighting (on the road immediately in front of the car). However, the beam patterns produced by this kind of "conversion" virtually always give less distance light, and often an alarming lack of light where there's meant to be a relative maximum in light intensity. The result is the illusion that you can see better than you actually can, and that's not safe.

 

 

The only safe and legitimate HID retrofit is one that replaces the entire headlamp—that is lens, reflector, bulb...the whole system—with optics designed for HID usage.

 

 

 

 

Her er også en interessant video:

http://www.youtube.com/watch?v=yVuSSdZNsZw