LED Interior lights are great, you can actually see what you are doing when you get in / out.
I am a huge LED fan but I won't use them on the number plate lights. They produce a very localised light. Too bright where it shines and too dark outside of the narrow beam.
They are fine of course but I prefer an even illumination.
Be careful when buying interior LEDs for the "Map lights", for some reason best known to Audi, they are wired around the opposite way and LEDs need current in a set direction or they simply don't work. On the bullet shaped bulbs that is fine, you can just reverse them in the holder, but the map lights have a central contact and so you would have to dismantle them !!!!
So make sure that you get map light LEDs that are suitable for the reversed polarity.
Steve B