How to plan my LED circuit, voltage, and resistor
Let us calculate the resistance of the LED at the operating voltage:

R = V/I

V= 21 v (typical), I = 350 mA, so
R = 60 Ohm.

The LED driver operates at maximum 24 volt with 700 mA, so it works with maximum 34 Ohm load. Any load with higher resistance will give an unpredictable current result that may damage the load. So you can not simply connect 35 ohm resistor with the 60 Ohm LED in series.

To divide the current, you can connect the load in parallel (not in series) with 60 Ohm resistor. If it is difficult to find exactly 60 Ohm resistor, you can use 56 Ohm/10 Watt resistor that is available in digikey. It gives 338 mA and 20.276 Volt in the LED.