very nice and easy to do. I didnt realize that HID dim that much over time. Learn something new everyday. The lights are way brighter now.

 

Cool! I didn't know they dim, either.

 

Good point but I have not seen any recomendation on when they should be changed? Anybody seen time in years or hours or??
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well mine is an 03...........maybe at like 5 years?

 

What brand did you get?

 

osram

 

from a couple sources, the general lifespan is 2500-3000 hrs or so... which equates to around 75000-85000 miles, or 5-6 yrs for the average driver. Of course things can shorten/lengthen that, the most significant would be if you actually use DRL's or not.

 

I have an 03 as well, perhaps time I change mine as well. I too never knew HIDs dim over time.

 

Well after a bit of research I have no real answer but I did find the HID's have a 2500 hour life compared to 400 hours for Halogen. So unless I use my HID's a good bit I think I have a few years left!!
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According to the service manual, the HID bulbs last the life of the car. This of course seems a debatable comment, but that's what Jag claim.
Curious to see how long it took you phd12volt to change. As I have just gone through the process of changing the 'ballast resistor module' attached to the light assembly. 1 hour to remove bumper. And as it was a reco module, of course its faulty (bought on fleabay) and I have to go through the process again. Seller is apologetic and sending another reco!

 

you do not have to remove the bumper all the way, remove the screws from the fender wells, and the 10mm bolts, drop bumper forward. took about 20 min total.

 

while i understand your wanting to know, i can tell you i can see better at night. my evidence is being able to see better.