Iam growing with the SP3000, and it is avery powerful lighht, if is recommended for 2x33x4 tent, but iam haing it noww in a 4x4 tent
it was overpowered in the smaller tent and i just let if run on 65 percent ( before)
As always it depends in the growspace you have, but i would agree for 3 to 4 Plants... i think even more