Welcome Justsprouting nice growing. I grow both photo and autos. I prefer 18/6 light. 20/4 seems too much when they veg. to me. There's a link below that a good member made that talks in general about the auto life schedule. Enjoy
Your plant looks great! She does look like she still has a week or two to go. I had good luck with my first grow using a qb288 quantum LED light. The vendor I bought mine from has disappeared which seems common in the LED grow light community.
Thanks for the info. After reading this I seen where my mistakes were in the changing of nutrients and stunting the growth. Will go by his example and see if the 4 new bio diesel mass auto do better