I'd recommend the one sf2000.
I did the same comparison, but deciding between 2 sf2000s or 1 sf4000 and decided on splitting them up and getting two 2000s, but the efficiency comparisons were different and, as noted above in the detailed breakdown, the 1 2000 is more efficient almost across the board over doubling up 1000s.
It'll be less fuss hanging one light, but that's minor. But still...
I did the same comparison, but deciding between 2 sf2000s or 1 sf4000 and decided on splitting them up and getting two 2000s, but the efficiency comparisons were different and, as noted above in the detailed breakdown, the 1 2000 is more efficient almost across the board over doubling up 1000s.
It'll be less fuss hanging one light, but that's minor. But still...