I installed mine myself and there's a little play in them, but only if you press hard. The setup isn't that sturdy, only one bolt/nut holding them in place with two press-lock points (? not sure what to call them?). But they make the truck look better and they work just fine for me.
Are you noticing any wiggle in the light pattern when driving? If so you may want to get under there and make sure the press-lock points are actually snapped in properly and that the nut is tightened down. I had trouble with one of mine.
