Just looking at your site. Curious.
From the HLG120H-48A page you have this:
rated current: 2.5A Max current: 2.95A can power the following combination of COBs:
Citizen:
2 1212@ 54.5W each (109W max),
[email protected] ea (105W max) , 4@ 25.6W ea (102W max), etc.
2 1818@ 78.5W each (157W max) or 3@...