What are you feeding your plants what’s the ppm on your run off? What are your temps? How often do you feed and what them?
The temp is about 18° to 23°-24° but imho it feels a little warmer inside the grow box. My friend uses 3 different brands of digital thermometers and they all show the same temp, but Im not quite sure
It’s hard to say what’s exactly making your plants reveg. It could be alot of thing… Maybe one day of really high temps. Or maybe a power outage for a day… Could be anything. I would go back and trace my steps… And see what happened in the grow that wasn’t meant too!
I figured it could only be the light. The distance to the light is about ~10cm, maybe less
Have you tried suppercropping to get it away from the light or try tying the top down just some thoughts I had