Yep that's not a bad idea, or just plug another two boards and run them at 600W *looks at Humple :>*Sure you've 7ft of headroom to play with.
Either full blast up high or dim and get closer, you decide.
You can also invest in more boards without needing more drivers for a better spread.
I've 2 boards on the 320h at 150 watts per board, 300 watts total but now it's getting cooler I can fire it up to 366 watts.... without heatsinks!