Join Date: Jun 2009
Location: Wilmington, NC, USA
Re: H7 HID changed colour!
That color shift is well known and normal. It is small enough that it usually goes unnoticed unless you have a brand new 4100K one for comparison.
The much larger shift you originally described occurs near the end of life. Often its accompanied by starting behavior changes. When it happens it is your last warning that its time to get a new bulb before it fails completely.
5 years is a fairly typical life for an always on HID in typical driving. Contrary to the belief of some, they don't last forever, just several times as long as a halogen bulb.
The name brand makers have more consistent quality than most of the Asian cheapies but if your basic install already has copycat ballasts I don't see a reason to spring for the more expensive bulbs.
Last edited by racer7; Sep 19th, 2012 at 10:59 pm.