The idea here was to add in a set of brighter puddle lights in the door sill, using blue LEDs (to match the rest of my interior).
To do this, I constructed a number of small "can lights" using brass tubing. the LEDs were set into the can and sealed with clear silicone. the tubing was then inserted through closed-cell foam blocks and the whole assembly was attached to the inside of the door with more silicone. This seals the entire assembly and prevents any moisture from getting up inside the door:
While I was in there, I realized I had two extra LEDs (I got spares in case I broke any) and I put that last set into the bottom edge of the map pocket:
As you can see, the 4 puddle lights are much brighter than the OEM white light. These are wired right into the existng puddle lamp wires, so they dim along with the rest of the cabin lights:
Not everyone's cup of tea, I realize, but it's different, anyway, and it's got me a number of comments so far.