This is a request to re-open the issue #0018338 (http://feedback.arma3.com/view.php?id=18337). It was auto-closed for being over a month old.
The issue in that report is still ongoing. Lightpoints will not stay affixed to their assigned locations on moving vehicles, causing them to jitter all over the place. I would request that the devs provide some way to attach lightpoints in the same way that the vehicle headlights are attached, since they work without an issue (so it's obviously possible).