Indeed it does. And injection is best, well ,where it is best, not necessarily at the string end.
Here is a more easily, and fully readable file (adjusted the color to be read without blanking).
VoltsDrop2.pdf (110.0 KB)
Curious the ground-limited behavior - just running a ground from the string end helps substantially.
Note: I am tying to limit the size of the wiring bundle for this setup.
Now I’m thinking about grounding this DC end of things in general, specifically WRT static buildup. And, about whether there is a better, more robust alternative out there that gives the "near 360-degree look)
@Scruffy do you have any wisdom to impart, or @wizard, oh wizened ones? It seems this LED arena is none too simple, Re your discussion with others noted above, and in this thread https://github.com/Aircoookie/WLED/issues/1312 and with @wizard in this thread - Timing of a Cheap Strand.
As such, I remain in your debt.
Happy Fourth!