I had a set of bulbs that I got from Tone in my VX for more than a year (I have HID's now) and the only thing I did was to upgrade the 10 amp fuses in the fuse box to 15 amps and never had a problem. I don't remember the wattage of the bulbs, but I still have them so I could check tonight if you need me to.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless