Bubbler System & New Grow Cabinet Quesions

HELP !! The full female (bonsai mum) that I didn't have room for, was put into flower, Plant appears healthy, all except the fact the all of the newer growth is extremely light colored. I am using 150w HPS, in cooling hood and set almost on top of the plant. Schultz orchid bloom for the nute, the clone tip that was planted is extremely dark and healthy with huge buds, this other one I just can't figure out. I have been backed off on the nutes for the past week, using plain water to half recommended nute. No changes. heat has been constant at mid 70s during dark 12 and mid 80s for first 6-7, then low 90s last 5-6 hours of (12/12). plenty of air moving through the chamber and humidity levels are ok.....any suggestions would be helpfull.

Thank You for Your Time and Consideration

Trying to get a handle on this problem before it gets worse. Had been over fert for about a week, went back to pure RO Water for a week and now back to ferts at or below recommended amount(s). Schultz Orchid Bloom being used, all others doing great...150w HPS in Cooling hood, see earlier pics, avg temps 85-89 during light period (12/12). Most everything else about the growing setup as well as plant info is in the many threads & posts precreeding this one. Any answers would be greatly appreciated.