Turn signal lights should be amber by law, don't forget that.
But don't get too dark of a tint, it'll attract attention during the day, and unless you drive in well lit cities, might get you into an accident.
I've also heard that because of the shape of these headlights/taillights, the lamin-x is hard to apply. I did yellow on my fogs without taking them off, and it took a good 15 minutes.
Simplicity is the ultimate sophistication.