DIY COB lightning - need some help

The 'B' version drivers allow remote dimming and you can gang up the dimming leads so they dim at the same rate. The resistance selection depends on the number of ganged drivers as per the table @Airwalker16 posted.

I just built a 4x using 1212's. Having done so I would use 1216's if doing over, less V needed. Using 4x 1216's you would be able to run a 240-1750 driver which gives you headroom...1212's require a little too much voltage...ask me how I know..lol.