Originally Posted by ssbtech
Third, quality. The forums are littered with people who have their HID ballasts and bulbs fail prematurely or suffer from other issues. Sometimes it's due to a botched installation, other times it's due to poor quality since aftermarket HID "kits" are 1) illegal and as such 2) aren't built to any standards. Do you really want to be troubleshooting an HID ballast issue in the middle of the night in the rain when your headlights don't come on? The tuners and the ricers don't care about these issues, but most "ordinary" drivers do.
Ironically, I put in cheapo HID's to replace my OEM 05 LGT bulbs which were burning out every 5 months. I haven't had a single HID bulb fail on me yet.