WS2811 chips are not "I2C" - they're daisy-chained, active driven (no pullups) and regenerate the signal (and re-edit it) as they go My experience is that chip

WS2811 chips are not "I2C" - they're daisy-chained, active driven (no pullups) and regenerate the signal (and re-edit it) as they go My experience is that chip to chip signal integrity for them is not an issue - however power/ground noise is, especially if you try and pass the power over the string to the far end