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I recall someone on the forum having an Xtec HID kit (I forget who), but I don't think you got ripped off...if anything, you got a good price for the bulbs.
IMO 7000K won't yield as good of a light output as in the 6000K (ask rominl). Plus I believe the 7000K appears slightly purplish (at least from the ones I've seen), and therefore seems dimmer than other lighting systems on the road. I've never heard of the Xtec HID brand before, but not sure if it's as reliable as the Philips kind