Good holiday-decor question — answering as the UphillTech team:
Voltage drop is a big concern with addressable RGB LED strips (aka RGBIC), because different LEDs need different voltages to activate, with Blue and Green having high voltage requirements (near the strip's rating) and Red being relatively easy to drive (can activate with much lower voltage). This tends to drive the white color (all Red-Green-Blue active at same brightness) towards a red color, since blue and green are more affected by voltage loss. This effect is much more pronounced in low-voltage (5V) strips vs 12V or 24V strips. If you're using all-white LED strips, or standard RGB (the...
Full answer by Fredric Shope: https://diy.stackexchange.com/a/332346 (CC BY-SA 4.0).
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