I cut open the halogen headlights and ended up with a fairly simple install in the end. I had tried to do a lot of custom wiring/leds but ended up not working out. I think it was because I wanted everything self contained in the headlight and running of the car wire harness but it probably needed an independent relay/wire harness connected to constant 12v+. I installed DMEX E2 bi-led projectors, 921 led bulb in corners of headlights for parking lights, 7440 led turn signals. The bi-led projectors are great and function as drl during the day at reduced power from the pwm from the car and go full bright at night. The entire headlight and all the components are enclosed and I even fit the dust caps back on. There are no external components which is what I wanted. They are not as bright as HID but way better than halogen and no additional wiring or drilling or ballasts, etc. Another project was to install smoked rear bumper reflectors that I installed red led strips in to function as turn signals. Anyways, I made a bunch of videos of the project on youtube so feel free to watch.
https://www.youtube.com/watch?v=wNo7ajTYbbQ
https://www.youtube.com/watch?v=wNo7ajTYbbQ