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Well, that line is correct and suppose to just be dark above that line. That line should also be at a certain distance up from a certain distance away.
It's suppose to more of a fine line, but that's just because of the projector & bulb you're using
My old projectors...
Should be measured at 25', best thing to do is find a common sedan, like a neighbors and at 25' aim them at just below the trunk deck, that way they will fall under the side mirrors.