first log, first coco, first success?

So the transplanting has been done. I first ran a bit of cal-mag through the coco and then transplanted and gave them their normal feed at about 850ppms. This was two days ago. Yesterday i noticed some overall yellowing. Last night i upped the food between 950-1000ppms.
I also put them under the 400 MH. At first i left them about 2.5 ft. from the lights and they seemed fine. Then it was dark for 8 hours, and then at the end of the following light cycle i lowered the lights for about 4 hours. Some of the plants are a little droopy. Not sure why...?
also a few of them have this fluorescent yellow thing going on. it is usually one entire blade on a leaf. At first i thought it was dripping the nutrient on the plant, but now i think not. Anyone?

My hypothesis on the drooping is that they are acting overwatered because they have just been transplanted from 6 oz. of coco to 1 gallons and do not have the root system. I was taught to still feed multiple times a day as the root system builds. I am a bit concerned.

There was also a spike in humidity and heat last night. 85% and 90 degrees.