Please ask ypur seller what the par out put is.
PAR output of 1.9 µmols per Watt - you can easily get that from a ceramic metal halide man, and it produces less heat. If the quantimmboard manufacturer cannot meat around 1.9. Then you rather get cmh,
But the benefits of quantum boards are they run 25 percent less heat too anhps light.
So for example. If ypu run a 4000 watt quantum board grow it will produce the heat of a 1000 watt really great for stealth lol.