I had to provide support and there was no place close by to get bamboo sticks so I bit the bullet and went with 4' fiberglass electric fence posts. These will last forever and will be useful in the veggie garden. I moved the plants and lamps apart and now have a 6' x 5' footprint.
The bloom feed is a tea of high P bat guano, EWC and molasses aerated for 24-48 hours. I add Age Old Bloom to this and correct the pH to 6.0-6.5. I've also been adding Plant Success soluble every other week.

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Into the end of week three. All the Ak-47 and some BG x BB have stretched over the tops of the 4' stakes. The lights were about 12 or less inches from the canopy. There is 10" above the lights remaining,at the most. So I bent over the tops so they are back to 6" under the stakes to stay even with the rest of the BG x BB and the Cyrils.
I'm feeding/water/water. I increased the rate to one pint of water (or tea) to each gallon of soil. A ratio of 8:1 soil to water. I'll have to see how long it takes for these plants to drink it up (some are thirstier than others). The lights on temp is 72ºF and lights off about 64º. I let the water settle to a temperature of about 66-68º.