yellowing veigns and yellow/copper spots on inside of leaves (PICS) please help

Someone Please look at these pics and help me to identify the problem here.. my soil ph was a bit under 6.5 when I watered and fed last but this problem has been forthcoming since before I watered last. It just seems to be getting worse. I was wondering if it was a calcium or Mag def. problem? I feed 10-10-10 but dilute it a bit as I recently began feeding. They are getting a lot bigger real quick but now seem to be developing this problem. The were drooping about 4 days ago due to being rootbound but have since repotted to 8'' pots and they have seemed to be refreshed... can anyone help me with this...PLEASE! I'm worried... Thanks so much guys you have been very helpful to me so far..
Oh my setup:
100W HPS 2x40w flouros eco-lux f40
2x20 W flouros eco-lux f20
both on at the same time which seems to help them grow both up and bushy.
This has not been a problem until now..
I have not misted my plants with anything besides neem oil about a month back to get rid of spider mites ( only a couple of them) and see no signs what-so-ever of any kind of bugs period now....
THANKS
elway

did you add dolomite lime to your soil?if not i would recoomend adding it as atop dressing.looks like your plant has gort ph problems

what is gort ph problems? isn't dolomite lime called something different when purchsed? where would I get it ? Home depot? and how much would I use and how would I give it?
thx.. first time grower...