First off, im having a problem truly understanding the question you have, but this is what i know. First off, i personally think upgrading to Xenon headlights is a waste in money. To run true high discharge headlights, your going to need what ends up being a very expensive ballast system, capable of providing up to 25,000V to ignite Xenon Bulbs. Of course after the bulbs are ignited, they are energy efficient to what i have heard, using very low current. Sure it all looks good, but personally, i would only have them on a vehicle of mine that came with it from the factory. Otherwise my halogens do me just fine.
Just my two cents
~Paul
~~And if anyone has more information, or a correction to my understanding of it, please post it up.