How does two of these stack up to one of those. Only reason I ask is this is what my local grow store has. And this light knowledge is to much for me to graspI prefer rapidled over timber for no logical reason.
Or you could go with HLG and grab two of these.
They'd crush your 4x8 area. What's your height?320W XL QB® V2 Rspec® LED Kit
Ultra High Efficiency LED Boards for DIY. QB288 has 288pcs Samsung LM301H LED. 320 Watt Lamp Kit suited for main light and supplement lighting. 3 ft. long heatsink for a wider spread.horticulturelightinggroup.com