UPDATE:  While I'm pleased with the light output of Philips H7 Crystalvision bulbs, after 11 months, both bulbs blew. I was vacationing in Maine at the time, so I picked up a pair of standard halogens ($15 each bulb with my "Massachusetts discount") and installed them, so I'd have something other than my fog and running lights for night driving, but the standard halogens appear dim to me.  I ordered a replacement pack of the Philips Crystalvisions and will install them as soon as they arrive in the mail.I cheaped out on the build of my Porsche Cayenne and didn't spring an additional $1850 for Bi-Xenon headlights, something I regret as I've had HID headlights installed on other vehicles and, although oncoming vehicles may not appreciate the blinding white light they throw, I feel more secure driving at night with them as roadway visibility is greatly improved.  After trying Sylvania Silverstar, which are roghly the same cost as the Philips Crystalvision, to find they didn't offer more illumination than the factory halogens, I considered an aftermarket HID conversion kit, but read that some conversion kits can cause damage to the wiring harness.  With that, I decided to skip the conversion kit and give the Philips CrystalVision Ultra bulbs a try.  Installation is the same as with any bulb with the fit being an exact duplicate of the OEM.  The light produced by the Philips Crystalvision bulbs is notably whiter (with a slight tint of blue) and brighter than the Sylvania Silverstar, which were an improvement over the factory halogen bulbs, closely resembling HID.  The cost of a pair of Crystalvision bulbs is less than even the cheapest HID conversion kit being sold on flea-Bay, but they are a direct replacement of the factory bulbs and won't cause damage to your wiring harness.  I've been riding around with these bulbs installed for about a month and I'm extremely pleased with their performance.  So much so that I'm planning to purchase a pair to replace the factory installed halogens in my high-beams, and eventually the factory installed H11 halogen bulbs in my vehicle's fog lamps.  Highly recommended.