These are through panel mounted LEDs that have been mounted upside-down and raised up off the board with a space made by clipping 100mil header pins. I'll take some better photos when I remember to bring my lighting rig to work...
This was the most successful footprint that I tried. It has solder mask relief on the component side and the reverse, with the LED mounted upside down. Forgive me the Crusty soldering job. The LEDs have a substantial gap in this configuration that may necessitate some form of non-melting filler or clip to span the gap without the enormous solder globs.
I added a small layer of nail polish to make the LED less blinding to highlight diffuse light. I think that the same effect would be both easier and better if I just mount the LED upside down pressed in contact with the board.
Prototype of my "business chit". I wanted to make a business card-type thing that was fun and memorable. I mocked up a quick logo design. I like the overall shape and the gold contrast. I have concerns that these are too small to be easily kept in a pocket, and hard to read for those without good vision. The logo may be to obtuse for non-technical audiences, and may also get rework. Or I'll just give up and put these in the bin. Who's to say?