I almost never measure ph(never have to), but when I do, it's in the 6.7-.8 range.
I grow 4-6 plants under a 600w. Also grow other plants in there (avacado tree currently). All I do in my life is garden. I have 8 gardens on my property, I grow my own redworms for vermicompost and rabbits (meat/manure) and most of my families daily veges.
I use fox farm ocean forest as the starting medium, but I brew my own organic teas with fresh ground alfalfa (just got a pound of seeds to grow it fresh next year) bat guano, vermicompost( worm poop), depending on the plant, I can usually tell by looking if a deficiency is present (they almost never are organically). I teach others how to grow and I setup grows locally for friends or people who pay for my expertise.
The hood I use (after many months of reading/comparing) has been tested against the best and comes out on top all the time. Sun systems super sun 2 hood. I use a quantum digital ballast. I don't need ventilation much at all since I have it in the basement on a large property and it stays roughly 75 at all times, with good airflow.
I usually stick to hortilux bulbs but recently I tried the cheapos from 1000bulbs.com
I never take pictures of my plants. I spend very little time with them due to my hobbies/health. However I did allow a picture taken once because the photographer was impressed with my results. It's an older picture from 3 or so years ago (a sour d clone whose sisters eventually crossed my male chili plant) this is the sour d plant I allowed to mature to evaluate its potential as a breeder/mother. This picture I have posted here many times to show the way my lst is accomplished. You can see me sitting next to the plant. I'm about 6 feet tall and around 260 at the time (much thinner now).
Anyways, this plant produced a little over a pound dry. It was the nicest sour d I have ever smoked and people were bummed I wouldn't let it go, so I gave a lot away to friends.
I was using fox farm nutes at the time btw and ocean forest mixed with cheap home depot starter soil and feeding it molasses every few weeks with cold pressed neem to the roots.
Ok very interesting and nice looking plant. I am actually just setting up a new garden as had to shut down my old room due to running out of space at home.
In the process of purchasing new lights at present which is going to consist of 3 x 600w for a grow tent 2.8 x 1.4 x 2 which will have 2 plants grown in deep water culture.
Considering the lights would you agree it is worth the extra cost to purchase high quality ballast and globes such as what your running although had been considering purchasing cheaper quality as inevitably want high quality LEDs.