First Grow. Dropping Leaves! Pics! Help!

This is my first grow, I'm running a aeroponics and 2 soil grows with a TEK 4 light (output 20,000lumens). I keep the temp around 80 and the humidity around 40-60%.The grow space is roughly 3 1/2 ft wide and 3 1/2 feet in length, the height is 12feet. I have 2 fans circulating air. I'm running 19 on and 5 off. Plants are roughly 30 days old.

As you can see in the pics the leaves are dropping and it seems to happen toward the end of the night but also happens other times. I wanted to know if anyone knew what was wrong? My next concern is when they drop their blocking light for the other fan leaves by laying directly on top of the others? Finally, with the aerponics should I be pruning or anything it's pretty bushy?

Any info will help me out let me know what u guys think. THANKS

Anything written here is a work of fiction and used for entertainment purposes.

more than likely over watering my plants do the same when im flushing my hydroponics between res changes let them dry a lil if top starts to bend over means to lil water but they bounce back quick so let them dry till you see the very top start to lean then water record time and eventually yo will have a watering schedule down

If its not overwatering i see cal/mag deficiencies to some of your lower leaves of the plants in soil, what ferts and what is the ppm of the water source, or are you using ro water? Have you added cal/mag yet?

verify the ph, make sure youve got cal/mag and MANGANESE in ferts. I belive some of those nutes are easy to luckout with higher ph's? Anyhow, my 2cents. My ladies do that (the necrosis) when I dont freshen my tanks, and allow ph to stay above 6.0 for too long. But, i am in water, surely soil will be similar. Best of luck, if it helps, they look good, and they will make it. Much worse has been praised a month later.

i saw the color of bottom leafs too but considering the bottom leafs are or look like 5 to 7 blade leafs i think theese are clones and the bottom leafs were deprived of nutes from the cloning process and the top soil looks damp sticking with over watering

by end of "night" do you mean dark period? Leaves will droop after a dark period, if they don't perk back up afterwards, then it's probably a nute problem as others stated.

I'm still with the cal mag.

How far off your plants is the tek 4, and you may have a little cal/ mag problem.