I have a 2002 Accura with HID headlights. I've noticed, fairly recently, that both headlights are much dimmer than expected. I'm fairly sure this is a recent occurrence. My wife's car also has HID lights, but are much brighter.
It's been hard to find good information on troubleshooting, although I'm sure it's out there. Just that sorting through general headlight articles, BS from typical internet urban legends, etc has become pretty tedious.
I have a couple of specific questions that will help troubleshoot the problem rather than wasting a lot of time and money trying various "solutions".
- Does the brightness of a Xenon bulb depend on voltage? My battery voltage is fine, and the alternator works as expected, but I haven't gone to the trouble of checking the voltage at the headlights yet - it's not so easy to get to. Since both headlights are the same, I'm assuming it's not the bulb or ballast, unless...
- Do xenon bulbs get dimmer with age? I've read articles that say both yes and no, but nothing from a reputable source so far.
I've read about refinishing the outer lens. I cleaned mine pretty well, but although they seem a bit cloudy, they are still pretty transparent, I think. Any suggestions are appreciated, although solutions like "replace the ballast", etc without explanation will be mostly ignored.