With the old D2 I had installed 2 rock lights on the hood shining down on the engine bay, 2 lights under the rear bumper, and 1 light on the rear door shining on the cargo area and ground. Finally getting around to installing the same mods and more to Wicked Witch! As cheesy as it is to add lights, it's extremely useful for nigh wrenching, finding your sleeping bag in the middle of the night that you forgot to set up, and to find out if your parked over an ant hill... The lights under the rear bumper are by far my favorite. It allows me to see the ground for insects, rocks/roots, and walking around the area without a headlamp or flashlight. Not finished with the project yet but thought I might as well share now.
With a black interior and lots of crevices I'm adding lights to the inside of the cargo area to make finding items easier. The inside of the D2 has lots of magnetic surfaces which I utilized by gluing a magnet to a rock light to help plan out placement.