Does anyone have these installed on their Regal S.B. or TourX? From what I can see on the "accessories" page of the Buick app, these sill plates run on battery power (2 button cells, it looks like). It appears that they light up in a BLUE color. I would think with all the WHITE lighting in the car, they would have looked better with WHITE lighting. If you have them, please post pictures and share whether they were installed at purchase, installed later by dealer or self-installed. Are you happy with them? Price (list) seems pretty steep. Thanks!