I'm sure you're figuring this out, but with CFLs you'll probably use lower levels of nutrients in late flower than with an LED or HPS. Since the lights are less intense, the plants will be more sensitive as they're not conducting as much photo synthesis...just food for thought as you start upping the nutrients. Coco is great because if you overdo it a bit, you can just feed mild solution for a few days and the plants respond so quickly you can really learn the warning signs of any kind of deficiency/toxicity very quickly.