I’m working on a long-run LED strip installation (think 20–50 meters) and I’m trying to keep brightness and color consistent end-to-end. On typical constant-voltage strips, the far end dims and “white” shifts, and under high load I sometimes see flicker.

So far I’ve tried the usual: higher voltage rails (e.g., 24V), thicker feeder wires, cleaner connectors, and power injection. It helps, but I’m curious what approaches people here consider “best practice” for reliability and serviceability.

Questions:

For long runs, do you prefer distributed power injection vs multiple smaller PSUs vs a higher-voltage backbone + local regulation?

Have you had good results with constant-current strips or per-segment regulation to reduce voltage-drop artifacts?

For addressable strips (WS281x/SPI/DMX), what are your go-to fixes for signal integrity over distance (grounding, buffering, differential, level shifting)?

Any rules of thumb for wire gauge, injection spacing, and PSU headroom that have held up in real installs?

I’m not looking for product recommendations as much as engineering patterns that scale and don’t become a maintenance nightmare. Would love to hear what’s worked (and what didn’t).