QUOTE (Login: Tom in Arizona @ May 22 2009, 12:20 PM)

I've been researching HID kits for my wife's '08 Azera. I can't get access to Hyundai technical data (yet), but a couple of the kits say that their HID units are tailored to match the projection beam housing that the Halogens use. If that's true, then the HID output is projected exactly as the Halogen is and there is no issue with scatter.
Most of the kits I've looked at have plug and play interfaces, with wiring that plugs into your Halogen bulb's socket. They're expecting the same power that the bulb is, and their solid state power packs use it to light the HID, saving you from re-wiring your car. The HID units twist into your housings.
My concern is whether the inexpensive kits are going to last. I can get one on eBay for less than $70. Riken kits, which have a pretty good reputation, go for $100 or so.
Comments?
Tom in Arizona
Virtually all aftermarket HID conversion kits use HID capsules, which have been rebased to fit the corresponding halogen lamp base. The base will "fit" very well, but how the beam pattern will be after HID conversion depends on which halogen bulb it is. For longest bulbs like H1, H7, H9, H11, etc., the distance from mounting base to the filament is not going to be significantly off between the halogen bulb and the rebased HID capsule, so the beam pattern should be similar. On short stubby halogen bulbs like H2, H3, etc., the variance could be pretty significant. That's bad. The beam pattern chould end up looking nothig like with the orginal halogen bulb.
So the safety caution with HID conversion is not baseless (pun intended), but it does sometimes get blown out of proportion by certain groups. Personally, I believe having better lighting enhances safety, as long as it does not come at the expense of blinding on-coming traffic. I started upgrading lighting in my cars long before HID became popular. I had 80w/100w H4 bulbs in one car for more than 6yrs and never got flashed once. To me, HID is a godsent. Unfortunately, some people use and abuse the technology and buy them to look cool rather than look where they are going. That's why HID has gotten such a bad rap.
I have 55w HID conversion on my '07 Santa Fe and the beam pattern is still very similar to halogen bulb. The horizontal cutoff is reasonable sharp, though light output aobve the cutoff line is still more than with 55w halogen bulb, just because there is much more lumens output overall. However, it is not objectionally so, and I have not gotten flashed by oncoming traffic yet. The key is making sure your headights are properly aimed - that applies to whatever bulb you use.
Yes, most HID kits are marketed as plug and play. While it will often work with the existing OEM headlight wiring, it is always best done with a relay kit that powers the ballasts straight from the battery post. Many the vendors (including Ebayers) recommend this practice.
BTW, 55w and 35w HID conversion differ only in the ballast; the HID capsule themselves are the same.