This is the kit I used for both Lows and Fogs
Zenex SLIM HID Conversion Kit H11 6000K (Diamond White) : Amazon.com : Automotive
However for the fogs I did have to use these
HID Kit Computer Warning Canceller & Anti Flicker (1 Pair) : Amazon.com : Automotive
I did NOT have to use a relay harness for either nor did the low beams require the warning cancellers, I know some of you say use a relay harness for protection...protection from what?? Never had to use a relay harness in any other car I've converted. This is the third time I've used this companies HID kit, however the first time I've used their 'slim' digital ballast. So longevity with these ballasts is unknown, however their other ballasts (analog) and customer service are top notch.
One thing I didn't notice on any of the other threads is if anyone re installed the low beam cap. The kit I have has a grommet in which the wires pass through, in order to fit those through the cap I used the largest drill bit I had and turned the bit sideways to make the hole just large enough.
And no, I did not remove the bumper. If you plan on tackling this start with the fog lamps, they're the easiest. You have to remove a plastic twist lock and one 10mm bolt I believe, then pull the fender liner back some and you will see the fog lamp assembly.
For the low beams, I removed the air box for the drivers side and did everything from up top, no need to even remove the access panel in the wheel well. I found the drivers side the easiest and it's the side I did first.
For the passenger side. In order to give my self enough room I removed the ECU (or whatever computer is behind the headlamp). Start by removing the connectors then undo the ground (8mm I believe). It is held down by a plastic clip on the top, just push that back and lift and the whole thing will come out giving you plenty of room to work. I did not disconnect my battery before doing this, not sure if your supposed to or not but the jeep started up fine afterwords and no check engine lights.
So all in all, not that bad of a job. I psyched myself out a bit reading people removing the bumper to do the job and it is completely unnecessary, took me about an hour and a half to do the lows and another ~45 to do the fogs (which I had done a few days prior).