Well from what I read, you gotta wire it up yourself since theres no running light on bBs and you can have a driving light (from what I understand. I still dont get it all. Theres too many JDM lights for me to get them all straight) You will have to wire yourself though. As long as you have the HID bulbs, the ignitors, the ballasts, and the actual light housings, I cant think of anything you're missing. Just gotta wire that shiz up. I think it would be cool however, to get a set of the OEM HIDs from the X version of the bB and run those. Only a handful of sets I know are in the US. Only bad news, is you better have a 1000 to drop.
i have the first gen bB headlights, basically you do have to make your own harness, but keep in mind, to wire them the way they work in japan, when your parking lights are on, the running light is on, not the side american parking lights, it only took me about 10 minutes to wire mine up nice and clean with female connectors, shrink wrap and some solder, if you need any help, lemme know
the OEM HID's you'll need to wire up both high beam and low beam. it isn't hard to get or make your own conversion harness. you will also need to wire up the turn signal (which is a running light on the US headlight). i've got mine wired up as a running light. the original Japanese running light I've got as my turn signal.
Running light would be the city light in a JDM light. OEM HID are going for 400 to 800 depending on how much of the light you want. Only the light is 400. you'll needs bulbs and harness otherwise. Pricey for me for now.