Originally Posted by MatsHolden
I'd definately go 6000k in colour temperature. Also mate you have to have auto levelling headlights in order to legally fit HID Xenon lighting, which the Astra doesn't have. So just something to keep in mind, becuase you don't want to spend all that money and then be given a defect notice to have them removed. Stay away from cheapo brands as they will last only a very short time. Philips produce a good HID Xenon system. But remember it all boils down to the auto levelling headlights, whether you want to risk it or not.
Cheers
Mat
:)