Critical autoflower

Hey there, so going just off this 1 week of info the 1st thing that came to.my mind was perhaps a little light stress from having the 400 watt led when they're young..especially a high powered light that's on 24 hours and less than 24 inches away. There could be many other things as well like high nutrient soil(are you using a specific brand?). Otherwise perhaps they're experiencing some watering irritation either from the decent size pots or an over/under watering? If you're leaning towards thrips or another invader, perhaps pick up a few of those yellow sticky card traps and put them at soil level in each pot and see if they catch anything. Hopefully it's just a temporary problem and they'll just grow out of it soon, but just a couple possibilities of what might cause some issues. Happy growing to you ✌️

The size looks decent for the age , they will stretch a bit more soon and the LST you've done is going to help them to have a better shape ✌️🏼

actually yes it will make a good difference, it will increase the lux which is a measurement of luminosity and light intensity. During flower the more light the better, even at this stage. hope this helps ! 🚀