Legal Kits HID Lighting Kits: Are They Street Legal In The US?

HID Lighting Kits: Are they street legal in the US? - legal kits

I have read before, without exception, all batches HID conversion is not street legal in the U.S. - from NHTSA

Even if the manufacturer or dealer installed.

It is permissible if it was built in the original production vehicle.

You can make a step without) to a "take conversion kit" (a little variety, but.

I know that does not necessarily mean something. You can use all sorts of things that the street lights are not legal - you buy at places like Pep Boys. There is some fine print on these things: "No Legal Street. For the all-terrain and / or used. Or something like that.

So, what is the real deal?

As it stands today - legal or not?

What I seek the answers to my question.
And no opinions about how the world should be.
No information about the headlights.
Not all the links that the answer can perform.

Please answer the question I asked.