So I know nothing about CFLs, but I would recommend some LEDs lights from a company like HLG. Those lights won’t do much in flower. Yes, you want a pH of 6.5 for a soil based medium.
Depending on the soil your going to need to feed it something. I recommend Jack’s 321. It has literally everything needed minus any beneficial microbes you may want to add (I use Real Growers Recgarge and Fish Head Farns FishSh!t). Insanely cost effective too! 3.6 grams Jacks Part A, which is the primary special sauce of Jack’s and contains trace nutrients as well. 2.4 grams Jacks Part B (Calcium Nitrate), which is your main source of, you guessed it, Calcium and Nitrogen. 1.2 grams Epsom Salt (Magnesium Sulfate), for your Magnesium and a bit of Sulfur.
Part A - 1000gram bag for $26.99 = roughly 277 gallons, $0.10 per gallon.
Part B - 1000gram bag for $23.99 = roughly 416 gallons, $0.06 per gallon.
Epsom Salt - Depends on brand. Bag I bought was 5lb (2267grams) for $13.99 = 1889 gallons, $0.0074 per gallon.
Then they have 25lb bags too!
If you see a magnesium deficiency, just add more Magnesium Sulfate… Nitrogen deficiency? Just add more Calcium Nitrate.
For reference, here is my month old plant using 2x HLG QB 288V2’s, Jack’s 321, FishSh!t, Recharge, Coco coir as a medium, topped and mainlined.
The bit of discoloration has been sorted out, but you can see the difference in growth. Also, just do you know, when you flip to flower the plant can grow over 2x its current height.
Also, highly recommend you get an EC meter as well. I recommend Apera for meters. The PH20 abd EC20 is the bare minimum I recommend. If you can sell out some more, get the PC60, it dies both pH, EC, and more. Plus it is more accurate, and has a backlight, which I like more than I thought I would.
EC is Electrical Conductivity. You may have heard of “TDS” or “PPM”, EC is basically the same thing, but presented differently.
TDS (measured in PPM) is Total Dissolved Solids, PPM is Parts Per Million. PPM is calculated from EC, and there are different conversion factors with going from EC to PPM. Some meters use the 500 factor scale, and some use other factors. In other words, two different TDS meters can give you wildly different PPM values. But EC will always be the same no matter what you use, provided the meter is calibrated correctly. So go with an EC meter for a more definitive value.
Recommend you look at Rain Science grow bags (what I’m using above) They are a mesh bag that allows soil aeration to a far greater extent than terracotta. So much in fact roots will even poke out of the mesh!
Happy Growing!