This is one of my all-time favorite and most-used vehicular tools: a hard-mounted interior reading light on a flexible stalk. This one is manufactured by Hella. I installed one in my first car, and used it for 12 incident-free years. The one in the Jeep is now 13 years old, and is still going strong. Both were/are mounted on the center of my dashboard, right above the radio.
Very handy in an infinite number of situations. Reading, obviously, but the directional nature of the light means a passenger can read in such that a drivers eyes are not blinded by glare. There’s even a version available with red and white lighting, for night-vision preservation. The new versions are LED. Havent used the new one, but Hella makes amazing stuff, so I’m very confident about a recommendation.