I ordered a few of there 600watt boards. I like them so far. This is my first run with them. correction I bought them from Geeklight. I was originally going to buy them from Kingbrite.
Board v4 plus. Lm301H+cree xpe 660nm+cree ir+LG uv. The ir and Uv have a separate switch so they’re not always on.
My 320w meanwell driver pulls 360w, so you could well be closer to the 750 than the 600w range. Maybe someone else can say for sure.
Most people would recommend the cree over the epistars but couldn't say if the price difference is worth it.
I don't think I have ever seen anyone test them side by side.