How to implement constant current LED driver for WS2811?
It is possible to use the current-limited outputs to drive higher currents
into large LEDs, by use of a current-mirror amplifier







simulate this circuit &ndash; Schematic created using CircuitLab
The transistors should be heatsinked, if possible, to keep similar temperatures; the 2N3906 probably can't handle this job, a higher power PNP would be recommended.  R1 can be adjusted according to emitter resistance of the
chosen device to tune the current gain.