I use a Cree XM-L RGBW LED.
Product Voltage: Red 2.25~2.6V, Green 3.3~3.9V, Blue 3.1~3.7V, White 3.1~3.7V
Maximum Drive Current: 1A
Maximum Power: 12W
Do I need to add a resistor between the Propboard LED driver and the LED ? what is the voltage output of the LED Driver ?