According to WA laws, (as my police officer friend has said) under car/hidden lights are legal as long as they meet the following specs..
1. The light source cannot be visible.
2. They remain constantly lit.
3. Any lights at the front of the vehicle cannot be blue.
4. The vehicle must remain stationary when they lights are on, that is the lights cannot be on when the car is moving.
Other than that... [(#)]
I've always liked the glow from the grille, been thinking about that for my VT, however I'm going to install spotties instead behind my grilles. [;^)]