[Richard]

The issue is complicated with no one size fits all solution.

First let me explain the technical challenge. The bulb has certain characteristics in terms of how light emanates from the bulb. The bulb has to meet DOT standards in terms of it’s projection characteristics.

The light housing manufacturer designs the reflector in the back of the lens to match the intended bulb.

Then the clear housing on the front is designed to put the “pattern” on the light beam. If you look carefully at the front of the housing you will see it is not a simple piece of plastic or glass.

Then to get DOT certification, the whole assembly must be tested and meet certain standards for beam, scattered light, and focal points.

When you put an LED or HID projection kit in one of the housings, you may or may not get a specific bulb that works. After all, they all come from China, and meet no standards. There are hundreds of them on the market. https://www.amazon.com/H11-H9-H8-9005-HB...WNrPXRydWU= I just put 9004 LED headlight bulb into Amazon to see how many popped up. Two things are interesting from this page. One, look at the array of different designs from the different manufacturers. Go to Autozone or whatever, and look at all the 9004 bulbs they have. They all look exactly the same. Second, look at the sellers own head on photo of the lens. The star pattern in the photo is the glare I am talking about.

So it is possible to luck upon a combination of replacement LED bulb and existing housing that works for you. But it is luck, not design. That is why I recommend against doing this, even though some have had good results with it.

That’s my .02