followed ledGardener build guid its sorta a hybrid between the 3x3 build and the 4x4.
im using 8 of the LT-F564B 2′ LED and driving them with HLG-320H-48B so only 320 watts.
178.9 lm/w
Diode Count: 1,152
power from wall 330watts
but this should outperform the HLG 300
i wanted the light pretty...