A couple of people have posted on the Keystone Raptor facebook group doing this with Opt7 red/white light bars. I stole this picture from there but there are several videos that give a better representation.
I think this is a very needed upgrade. Most drivers do not see the little lights at the bottom of trailer. I frequently get accused of not using my turn signals but I do, silly that Keystone puts them all the way at the bottom.
I ordered a set of the lightbars, hope to install them in the next month or so.