Not sure how DOT would view a light strip as the only rear lights.
But, before I worry about DOT, I have to like what I put back there. Somehow, the light strips I have seen/found so far all seem a little "too slim" for my taste.
I want to be sure that when seen from the back, at night, there is no doubt the they can see the back of my truck - and that, during daylight my turn and brakes can be clearly seen.
I am just not sure that a thin light strip can do that if it is the only lights on the back.