Far red and Infrared are different. Far red helps the plants wake up and start budding earlier. It seems the plants Photosystem II is especially sensitive to Far red light.
so what will be the best solution for 8 cob's per 4x4 tent?
2xHLG-185H-C1400B or 2xHLG-240H-C1400B? Maybe 2xHLG-320H-C2100A?
For example: MIGRO 600 has 3x250W 2100mA drivers with 6 cob's on small heatsinks and shows pretty nice PAR map on 4x4 tent...