I'm growing 2 lowryder2's and one bcn diesel auto....I don't know if it'll help or not for your application, but I use david's grow which is a generic version of the 3 part general hydroponics formula that's working well...as far as lighting goes Ive kept them on 18/6 pretty much the whole time. Now with feeding, I've found that you gotta take it easy on em the first couple weeks in dwc, but after that you can bump it up to a little under the recommended dosage for seedlings...I'm at a little over a month in and they're just showing sex. To go back to lighting, I just have em under some 6500k cfls, about 350 real watts.
Hope this helps man