From my understanding the Bi-xenon headlight is standard on the 991. However I have not been able to find a figure showing what bulb is for what.

I can see the main lens which is clearly the Xenon. This is switched on for low beam, and remains on for high beam.

Below the Xenon there is a H7 bulb which comes on for high beam only. The light pattern from the Xenon did not seem to move between low and high beam.

So is the high beam light produced by the H7 or by the Xenon. If it's by the H7 then what's so "Bi" about the Bi-Xenon?

Thanks for any wisdom in this aspect!

 

Been doing some Google searching...

Why I'm confused is that according to this page, we have Xenon D3S low beam, and H7 High Beam. If that is the case then how do we have "Bi"-Xenon?

http://www.lightbulbs4cars.com/porsche%20bulb%20guide

And if we already have Bi-Xenon, why are there companies selling a 991 H7 to HID conversion kit? So we end up with Tri-Xenon?

http://www.carxenonhidkits.com/911-9...e-911-991-2012

Thanks!