the typical voltage of one 048 1212 is 34.5v, so 5 is 5x34.6v=173v, and 173v x1.4a=242.2w and HLG-240H-C1400 output 89-179v and 1.4a, that will work good for 5pcs 048 1212 in series, even if you go with HLG-320H-C1400, you still get the same power consumption but higher cost, that's not cost...