If you mean the 5.75" headlights, they could have the Xenon bulb upgrade from Stafford Vehicle Components. They were offered as an upgrade to the standard bulbs for a tenner when purchased with the new rims
Thanks chaps, H4 is perfect. Just looking at getting some of the Philips or Osram night bulbs for the Passat, and seeing as the Caterham lights are not that good, may as well try some new bulbs in there as well.