Dimming a MW185-1400 to 1050

So, I have a spare 185-1400B that I'm wanting to incorporate into a build that runs at 1050ma. I understand how the dimming lead works with a "pot." I don't really have a need for that type of adjustability, even so, how far do I turn the knob down on a 100k pot(if I had one)? I'd rather have a set current, and what I do have is a plethora of resistors from my fathers HAM Radio modification days lying around. In the Growmau5 DIY video series, in part 7, he demonstrates using resistors to achieve this. What I cannot seem to find out, is how to calculate the amount of resistance needed. I feel like I should know this, alas my ignorance prevails.....

75K

Have a closer look at the datasheet, dimming options.. They clearly stated out which resistence you need... Take a 75k poti and your light should be maxed out at 1050mA. I'm using linear poti's and a small 0-100 scale and have a 300v/10A VA-meter connected to the dc circuit.
Resistance dimming is very linear with HLG-drivers, if dimmer knob is at 50% I got 538mA from a 1050mA rated HLG-120.
100% is 1060mA, with open dimmer circuit 1080mA...

Much thanks fellas

I must have scrolled past that page on the MW data sheet dozens of times, couldn't have been any easier to find....LOL