A key thing is to not just add lights floating in space. Instead visit real locations, and pay close attention to how and where the lighting is. If you can’t visit an old diner, then look at tons of references, and try to map it out.
Seattle is cool as well as the Bay Area or Austin, but the problem with those areas is that there are a lot of local, skilled, out of work artists there already.
There's a show on the History Channel called "Sons of Guns", they made a tactical upgrade to Thompson for a local sheriff, here's a link to the picture linkage