I won't get into debating whether or not you should use HID's in standard lights. That'll just elicit a bunch of flak. Suffice it to say that the BEST way of doing it is to buy a complete factory HID lighting system.
If you decide to fit aftermarket conversion kits, your car has separate lamps for the low and high beams, so you'd need 2 kits. However, if you decide to do this, it's really only desirable to use HID's in the low beams. HID's take a couple of seconds to come up to full output; with high beams that you're always turning on and off, they'd rarely be on long enough to reach full output.
OE bi-xenon systems actually just use a single light source for low and high beams, and a motorised shutter to shut off the light from the high-beam portion. This means the light source is lit continuously (when the headlights are on), so the high-beams are immediately at full light output when they're engaged.
So, if you're going with aftermarket kits, just use HID in the low beams, and leave the high beams alone.
If you decide to fit aftermarket conversion kits, your car has separate lamps for the low and high beams, so you'd need 2 kits. However, if you decide to do this, it's really only desirable to use HID's in the low beams. HID's take a couple of seconds to come up to full output; with high beams that you're always turning on and off, they'd rarely be on long enough to reach full output.
OE bi-xenon systems actually just use a single light source for low and high beams, and a motorised shutter to shut off the light from the high-beam portion. This means the light source is lit continuously (when the headlights are on), so the high-beams are immediately at full light output when they're engaged.
So, if you're going with aftermarket kits, just use HID in the low beams, and leave the high beams alone.
