The price of HID has dropped significantly since I bought used Audi parts on
eBay.  Here is a sample on eBay of two new assemblies for $29.98 with your
choice of color temperature.
http://www.ebay.com/itm/xeno-HID-KIT-H1-H3-H6m-H4-H7-H8-H11-9004-9005-9006-9
007-D2S-D2R-6000K-H9-H10-H13-/150962445185?pt=Motors_Car_Truck_Parts_Accesso
ries&hash=item2326101b81&vxp=mtr  

I use a Precise Flight "Pulselite"
http://preciseflight.com/general-aviation/shop/pulselite-general-aviation/
for additional daylight recognition and it looks brighter than the Santa Fe
Super Chief when Claudette is coming down final.  

Steve Colwell  Legacy