OK, so looked at real litronic lights and couldn't swallow the $1300. I have had HID retrofits in a lot of my cars before but have had mixed results with them. I generally buy a projector housing for the car then put hid in that and even then they are not that great.
I bought this kit from CQ Light:
H7, 5000k http://www.cqlight.ca/index.php?cPath=32_45
They are plug and play lights ment for a H7 halogen headlight. The install was really easy. As a matter of fact the easiest I have done in any car. The headlights pop out with the tool in your bag in the spare tire in about 30 seconds then plug in the HID light, zip tie the ballast in the headlight hole to something so it doesn't flop around then re-install the headlamps. You will need to drill a hole in the plastic cover on the back of the headlamps for the hid wiring to go through. Two wires for the bulb it's self and power and ground that plugs into the stock wiring harness. No cutting or soldering involved. The kit comes with power leads with spade connectors on it already that just slip into the stock bulb socket no probs.
The stock halogen lights have the european code light cut off like this. ____/ if you have ever driven close to a wall you will notice it. I took before and after pics. The cut off was exactly the same with no glare or light wandering away. The cut off on the stock lights is really good and cuts the hid off just like the stock bulb so you only get light were the factory light intends it to be unlike most cars. Generally hid retrofits in stock housings have light all over the place which was the case for me a few times. This is NOT the case with Porsche lights, lucky us.
Here are some pics. Notes for each pics are under.
Halogen lights as stock from Porsche.
HID retro fit installed. You can see the cut off is exactly the same on the wall. The car is in a slightly different spot here and it's much darker ouside in this pic making the lights look a lot brigher. More or less the light is exactly the same and in the exact same position.
Halogen light stock.
HID Retrofit with fog on to see difference.
Stock H7 vs. HID H7. You can see the arc point is in the exact same spot. Might be hard as I'm holding the bulbs but they were identical.
Headlights outta the car. 30 seconds a side really.
Stock bulb out. Got kinda hot there wow. HID are cooler running so thats good. The top is the low beem. The HID retrofit goes in like stock. Just run the wires out the plastic cover, drill a hole.
On the front of my house. Same as stock cut off.
HID on the road through the windshield at eye level.
HID on the road over the windshield.
Color of HID 5000k retrofits.
Color of stock halogens.
Just incase you wondered about HID retrofits, you can now see they are just as good as stock. You get the light of HID without 1300 bux. Remember real litronic are better, self leveling etc. so they are worth the money. For $200 you get more light output than stock, the nice HID color, and no downside typical with HID retrofits.
I think that Porsche did a really good job on the stock headlights as they have good cut off from the factory. With a lot more light output from HID lights, they still control the light very well and get it right on the road with no glare.
Bottom line, really good for the cost, and really look nice too.