Originally Posted by VTECaddict
They fire instantaneously. Even before fully warming up xenons will be brighter than halogens.
And all E92/E93 and E90 LCI xenon work this way.
Based on what I see when I turn my headlights on I certainly wouldn't call it "instant" by any stretch.
And, again, the "ignition" phase of xenon lights is likely to be stressful to the all of the components involved.
It's your car, I guess....