I like those, good job!

Currently my backup lights don't work since I removed the console where the switch was. I have considered doing something like you have done but use red LEDs behind the back up lights to make them an auxiliary brake light. So when your tails and turns are on it's just the small lights, hit the brakes and the whole assembly is red. It would probably look dumb but it would be enough of a change to be an eye catcher.

My car has been hit from behind before so that changes my angle on this some also.