Several years ago, I installed white faces on most of my gauges. Dunno what happened to the rest of the set. Recently, I purchased another set, and installed these white faces on my gauges. They looked great...during the day. At night, my original white gauge faces turn dark (which I had not intended), and the new gauge faces stay white (which is the look I had intended). Unfortunately, now my gauges still do not match. So, I'll have to do it all over again.
Moral of the story: be sure of what you are getting, install all of the set of faces, and test day and night.
My intent was to make the gauges easier to see/read. The newer faces are much easier to read day and night. The dark is hard for me to read at night.