Toomanytoyz-
Yes, they are to both light up internally so you can read them at night. In addition, it casts light down so you can see (well kind of anyway) the window switches. If you search the fourm, I did an explanation on it. In essence, the bulbs are replaceable nut they are micro in size and hard to change. There are other Buick models in the wrecking yards you can pull these switches from and you are bound to find some working ones.