Driving high power LED using WS2811 or WS2801
I Thinks it better to go with WS2801 and you can implement the below circuit for your application.



Need to take some special care while selecting the Transistor Q1. Since the requirement is to flow 350mA of current so its better to select the transistor which can carry arround 500 mA of current.

Resistor R1 is used to set the current limit and this doesn't depends on the voltage supply VDD. The equation for this can be given as

R1=0.7/Required current.