I made a 550HLG clone with the QB304 boards and 240-1050 driver. It puts out 495 true watts.
My next build incorporated the china lights that I already bought when I first started. The Quantum boards are on each end and the china light is in the middle. The china light provides the extra red and blue light. This is my first grow under those lights so the results aren’t in yet. I built 2 of these for a 3 x3 space.