Hey Friend
I think (IMO) that they look fine. They are green, and not brown, and there appears to be no damage done to the leaves as if you were to have spider mite, gnats etc. Sometimes, as parents, we tend to think that they are not growing as fast or as healthy as others. If you look at an array of pics, it always looks better "across the fence". Trust me ... "The grass is not always greener across the fence, unless it is over a broken septic system" !!
I see where the temp is at 82F and that is "within the guidelines" of where you need for it to be. How about the humidity level? Does your instrument that reads the temp also read the humidity? I know that mine does, and that is how I know if my plant(s) are getting enough light and humidity level. Also, is your equipment that tells you the heat index have a lead to it? If so, you will want to place the lead at canopy level. This would give you a very accurate reading. (I too look at my girls, and then jot down; The time, temp level, and humidity. I then place this info, along with other details, into an excel spreadsheet. This way, I will be able to go back and refer to this as my grow(s) progress. I also Journal on here, as well as have a separate hardcover notebook, complete with pricing details from Home Teapot, Wally World, Hydro Shops etc. I write down sort of like a "Diary" at the end of the day, so that later on down the road, I can look back and see what worked, and what did not.
Just a few tips from me on how I do it ... Just a suggestion. Hope that something in this post helps you out. As I said before, YOU are doing great, and I am only here to help you out in a friendly way. Take Care and stay safe Bro
The MaineYankee