[RedDevil]

Originally Posted by mcrews

We agree and disagree.
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The test is NOT to re-align every bulb to achieve success. Agreed? (understand a 'test' is to determine if a given product works as purchased......not how a smarter person would adjust it.)
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I disagree.
Mine had instructions to check and correct the alignment after fitting.

I thought it was common knowledge that you have to check the alignment after fitting, not just because of manufacturing differences but also because of bad fitting. It is always dark and raining when you need a spare. Mistakes get made, like missing a notch or bending the glass out of position.
But even if all is well the lights do differ.
I have needed to readjust halogen replacement lights quite often in 30 years of driving cars. And finally the HID set too.

So, one HID lamp in one test failed the test after fitting and not correcting the alignment where it was obviously out.
That can hardly be the base for any kind of general advice, but that is just what you do.

Suppose you fit and align the HID bulb first, then put in the halogen without realignment. It would fail!
I should start a new thread about the danger of halogens!

My advice would be to always check the alignment after fitting any type of light.