I am guessing, but if you are referring about the little hidden light in the Overhead Console, it is smaller than a pencil eraser.
It is a light that shines down on your floor console, so that you can see your cup holder
when the Sun goes down, hold a sheet of white paper down to the right of your right knee
With my 2009 Dodge Ram, that light used to drive me nuts at night, while driving across the desert
It shown down on the Chrome Rectangle & reflected onto my passenger door glass. it was a little Blue light that just stayed at eye height in that same spot on the window.
I first noticed it around Midnight, nothing but desert out there, except an occasional vehicle.
I swear, i thought it was a Flying Saucer