Typical HID's should last about 5 years. The kits made in China last around 3 years. The JDM kits like Xetronic will last 5 years since they are made in Japan. I had the Xetronic kit in my LS for almost 4 years before it was sold. I will say this, I wouldn't sell it if it wasn't good enough to put on my car. Danny, gt95coupe, has the best kit Xetronic sells. I have that exact same kit in the Nissan Pathfinder I am driving now. The kit is well worth what you pay for it. Also, Xetronic warranties their product too.
There is an old saying, you get what you pay for.
Also, I have never said we were the lowest price place on the internet. However, you can save more than that if you become an LvC Gold Member with 10% off anything in our store. Something to think about if you want the real good deals.