I don't think you can change any of the main led lights on the car, likely to be a completely sealed unit. I noticed the front lights are a bit "shorter" than on my other cars but I'm actually OK with them, makes me drive a touch slower

and it's less annoying since nobody is flashing me non-stop thinking I have high beams on

... What I'm not quite happy about is how flashing high beams works, it's not fast flashing but almost a second long on/off "flash" so it looks weird when signalling someone or flashing "thanks" ...
As for the dirt, yes, all the dirt and dust would get in from around the front wheels, hopefully not much of a problem unless some water also seeps in... any wet patches that you noticed around there?