The auto-electrician I went to, took the whole front bumper down and the headlights units out, solder, drill, seal it and stuck all the wirings with tapes and thus spending 3 hours on the process. They said to assure the warning lights do not appear on the dash and prevent condensations from occurring. I have not informed them of all these I have read in clublexus. Maybe they know their stuff?
Anyway, as long as you buy a smaller K, the chances on putting on glare and attracting the wrong attention is minimized. Using 4300k to 5000k. Besides there's this small knob on the right side of the instrument panel above the fuel and boot switch, it has numbers of the angles you want to project your light. Put it to medium so most light shines on to the road more than the street signs. That should do, I think.