Well technically speaking all aftermarket HID kits are illegal lol. Pretty much any headlight housing that was not designed for HID lighting and in turn only designed for Halogen is illegal. No glare cutoff to stop light travelling other than in front of the road to a certain distance, hence blinding oncoming traffic. Now taking into consideration that our CT's have a projector based headlight it makes things a little easier (still illegal though) but manageable. Basically you'll aim your low beams a slight angle towards the groud while still getting AMAZING light output from the HID and controlling glare to oncoming traffic, be advised though there will always be that hint of glare to oncoming traffic. If I were you I would not go for anything higher than a 5000k setup, go 4300k if possible as this will be the best light output you can get. As for you electrical system, the only time a HID setup takes more power than our halogen based lighting is when you fire them up, the ballasts need all the power they can get. So I would advise when turining them on make sure the vehicule is running, just to take a slight load of the current running through your electrical system, and you shouldn't have any problems with a HID kit besides the fact that most are made in China and are not reliable at all. Just be prepared to be replacing bulbs and/or ballasts alot more than if it was OEM. You mught get lucky though, I've seen some guys running off aftermarket HID kits for over 2 years without problems. When it comes to that its a coin toss. The end results are so worth it especially for night driving, it's 2-3 times brighter, especially a 4300k. I am very impressed even from these basic halogen projectors that the beam pattern is quite wide, better than most on the road I would say. I wouldn't compare the light output to that of the 2004-2006 LS430's those were insane, capable of lighting up to 8 lanes wide, but my CT200H has no trouble with lighting up 3-4 lanes on the highway nicely, thats better than most BMW,Audi,Mercedes with Bosch and/or Valeo trash projectos. Hell my Ct200h lights up the road better than my dad IS350, and his vehicule was designed with HID, just the projectors really suck.
Hope that helps
Hope that helps