Humidity could be your problem. If they transpire too much, you'll get cavitation which affects turgidity and causes wilting. You could try bringing it up a little to see if it helps if you want. Other than that, they look healthy. You could flip whenever really. Should bush nicely.
My canopy usually shades the soil right out. I'm just thinking that it might burn younger leaves... Between the heat reflecting and lighting up both sides, light bleaching would be my first guess.
Yea. Whatever you've been feeding. They won't start a heavy P feeding until the 2nd to 3rd week of flower. The N will last them to there without causing a toxicity. The leaves will yellow out as they flower which is a good thing so don't freak out.
Depending on how dry your medium is, you could do one more veg feeding for the additional N right before flower. Then switch over to your flowering nutes. They'll burn it off as they stretch.
If you just fed them, you can switch to flowering nutes for the next feeding.
Hard to tell from the pics. I see very little amber. Lot of milky and still some clear. Use a loupe just to make sure. You looking for heady or couch lock?
Personally, I'd give it another 1-3 days and check the trichs. Once you start seeing some amber... Well you know what to do.
That's pretty horrible advice if you ask me.
Maybe 1 1000W, but 4 with 2 more 600s? That's 5.2kw per hour. That's a fuckton for a 3 bedroom house. That's closing in on a small warehouse's usage.
You can do what you want, but that much will make you a blip on the radar for sure.
Safe from what? The amount of energy you use is irrelevant to physical safety. Now law enforcement safety if you grow illegally... You might as well just advertise that you're growing.