Do they sell a special junction box that can be placed over a stud? My only other options would be to move the fixture to the left/right or install a light in the ceiling over the sink. I’m leaning towards the ceiling fixture if I can’t center the wall fixtures.
Daniel: I guess I didn’t describe it right… I want to place one light fixture over each sink, but the wall studs are centered in the middle of each sink. I now have a cabinet between the two sinks where the one light fixture used to be.

Robin: I might go with that idea if the light fixture base is large enough to cover the junction box hole in the wall. I was hoping there was a flat or half junction box that can sit next to a stud.

Charles