Yellowing leafs please help!

[thcjoshthc]

I turn my light to 12 12 about a week and a half ago and now my leaves are beginning to yellow sporadically throughout the plant it look like it's started from the top down,I switched from regular late growth nutrient solution to transition solution the day I moved the light to 12 12 below is the picture out of the feeding chart I'm using general hydroponics trio Cal mag one drop per gallon of superthrive pH up pH down I'm general hydroponics I got good aeration humidity Zack 70% most of the time temperatures at 70 in the room and the water temperature is about 69 degrees

 

[thcjoshthc]

Pics don't show the yellowing ,and that was yesterday,today it's getting worse !should I go back to late growth feeding?