My flowering room is 12 x 12. There are 7 400w HPS lights in it. Each light is over 2 1 x 4 trays that are set up to hold 6 netpots in an E & F configuration. The trays, and thuse, the lights are hung right next to each other, so I suppose it's safe to say each tray gets more thanone light's worth of illumination, BUT
The yields I quoted are accurate. although the AVERAGE is closer to 40 ounces per 12 plants. My best was 48 Ounces from a 2 tray (12 plants) batch.
I got sick a year and a half ago and shut down the grow, but am about to put the first batch of new clones in the flowering room in a SCROG setup. I can post pics of the room itself right now, but there are no live plants in it... They're all still in the cloning room with Mama fore the next 2 days. (White Widow from A-Dam)
Oh, BTW... I keep the CO2 at 100 PPM with a NG generator.
None of this is Bullshit. Believe what you want.