Hi Bezz,
I'm doing up my LED using the Meanwell ELN-60-48P driver. Probably the Arduino controller will be a later project. How are you driving your LED - by buckpuck or Meanwell?
If you are using the Meanwell, I would like to check how you pull up the 0-5V PWM output of the Arduino to match the 0-10V PWM input of the Meanwell.