It is the most interesting one of them all.
The most avantgarde, and no moving parts. No actuators. The LED's are probably CREE chips, which are out of the patent and are cheap as hell. The power requirement is much lower than the Halogen and the lumen output ratio is absurd :D
I had an aftermarket kit for my car. I used it and the light was so powerful that I would light 300-500 meters in front of my car. In the day I installed them, was coming from the service and I passed a police check, the policeman was busy but he was looking in my direction with his hand over his eyes. When I got home, I took them out and installed the halogen back. Any car light modification is illegal in my country.
Still have them in the box.