Maybe Im wrong, but I thought Stephen said something about the optics being what really "made" the boards so great in the first place. If that is the case, why are you selling them without the optics?
The optics is what makes them great in a commercial type set up (I.E. Non reflective environment.) Most people here grow in tents which makes bare boards totally acceptable. We are going to be getting optics in soon and will have those available as well.
Also the sheer amount of light these produce per watt puts them in a good position anyways. See Capitan Morgan's Grow with no optics.
We have a few optics if the customer wants them. They are designed for optimal canopy penetration not from shear power(kinda works) but actually casting the light from many different point sources to help eliminate shadowing. if you doubt the power of these boards don't lol. The optics can be placed differently to create the intensity you desire. I have them placed all facing in and this is better for a hanging height of 24"+. At 18" directly under 3 boards with all optics facing in the instantaneous PPF measurement is ~1100. I'll have
@robincnn post par chart shortly of 2 of these in a 4X4 grid non reflective area. They consist of 3 boards each on a hlg240h-c2100 driver.