I havent been reading any new material on growing. Just been using advanced nutrients 3 part with some of their other stuff cal mag - big bud- and the ignitor for the switch to 12 12 for 2 weeks. So im growing ak 47 , 9 # hammer , pineapple express, agent orange, dj shorts blueberry , andblue cookies. Now im using 2 1k hortilux hps bulbs for a room thats about 8 ft wide and 12 ft long. Using inline fans for incoming and outgoing air and to cool the 2 1k watt air cooled hoods. Why do my flowers seem to yellow is it too much light maybe? Not all my strains do that but i notice the dj shorts did and the 9 # hammer did . Both seemed to do it a bit in flower not all the way but somewhat but in flower i know they yellow near the end but im just wondering. Got my clones from a 502 nursery. All my weed goes to my friends or people i know who dont have enough money to pay rec prices so i just give it away mostly. Not that its not sweet and potent but just because i can and i hardly smoke it. No mold or pests ever. Temps usually 70 72ish lights on and id say 60s lights off maybe 65. Using advanced nutrient 3 part with additives from their simple line. I never ph cause its ph perfect? Please any advice would be appreciated.