The Neopixel-illuminated halogen lamp looks much, much better than I expected:
The ceramic ring screws down around the socket shell and pulls it up against the base; the threads have only as much precision as required to keep it from falling off. I may need to add a leveling shim just so I don’t have to explain why it’s always crooked.
And to satisfy, er, someone’s OCD.
Oh, you ain’t seen nothin’ yet …