the only problem with the cats zeta system is that being it that they are not an true HID (read H.igh I.intensity D.ischarge) system, then all they can be, and I have checked them out and know them to be, only a voltage booster...what they do is run stock bulbs (although the kit comes with its own bulbs to fool the consumer) at higher voltages, though at lower currents. therefore the bulb burns much brighter, and although their ballast runs the bulbs at lower currents and they won't burn out as fast as if you up the voltage by other methods, the bulbs are still subject to abuse. Pillips, Bosch, and Hella HID kits are the ONLY way to go, and there are sources that have them at and below the $500 mark. Just my 2¢