I'm getting my door handle LED's installed on Saturday. I am going to have them respond to my dome light. So they will only come on with my dome lights.
If you are wondering what I'm talking about here is a youtube video demoing it. Mine are going to be amber though..Hindsight..it would have been probably cool if I had blue ones which would match my interior blue LEDs. I'll just see how I like these and if I don't then will get blue ones. I think it will be ok because of the exterior amber parking/signal lights plus like I said they do not remain on. I think it will be a nice accent when I unlock my car.