Plants Droopy looking Stressed

Hows it going everyone
I'm 2 and a half weeks into veg out of the solo cup in 1 gallon pots. I'm running royal gold coco mixed with 30 % perlite. The strain I'm growing is moby dick.I feed everyday. right now there getting 600ppm and a ph of 5.8.
So the plants have been growing nicely in my opinion I have them under a 1000w hps they are dialed in at around 40k lux to 49k lux to obtain 38 moles a day of DLI. My temps are at 75f to 78 f and my humidity at 65%.
So I just got the mars hydro sp3000 yesterday along with a 4x2 tent. So I took the plants out of my 5x5 under the 1000w which were doing fine.
This morning i woke up to the plants looking stressed the fuck out. I adjusted the light to 39 to 42k lux to achieve the same DLI and give the the moles required for veg under the 18/6 cycle. The humidity is the same the temps were a bit low though??they hit 64f so could a few hours of cold cause this??They had there sleep and the lights have been on for 4 hrs now and it looks like there getting worse.

All info would be much appreciated
I hope I covered everything surrounding my grow.

It’s possible you are overwatering

Thanks. But I only give them 250 mls each everyday and get about 20% run off and they haven't had an issue. I am in coco w/ perlite as well.

the lux you measure arent the same lux you measured under the HPS, my guess.
you give them more PPFD now then bofore.
Lux meters measure mostly green, you have a complete different spectrum now, dial the light down and see that you the get temps up if possible..

Will do. appreciate your advice

Thanks @cobshopgrow 4 of five plants have perked back up. The remaining one, will also perk up but I think it will take a bit longer..

Looks like overwatering for sure. Usually I never get the issue with cloth pots. Oh well, easy to fix.

light stress
reduce DLI