Thanks for taking the time to figure that out, I truly appreciate it. Perhaps next time I'll put the horse before the cart, and ask before I buy them. Oddly, on their website they say: "Coverage Area: 36″ x 24″ @ 16″ above canopy" -- which I believe would be 6 square feet? My intention is to move that light into a different space, but I would still be counting on it to cover 4 square feet (it's a 2x4 room, and I have a pair of them). It sounds like my plan is insufficient.
Other question, can you run Vero 18's and 29's side by side, or do they require different distances from the canopy? (I'm wondering about putting A51's W90's on either side of an Optic 120)