New To Growing: Problem With Leaves

I have a little grow room set up in a closet. Its about 2ft x 2ft and arount 5ft tall. I have kept the temperature at a somewhat constant 77-85 degrees with 40-55% humidity. There is a fan at the bottom of the grow area that blows air all over the plants and vents out the top. I have 2 grow lights that hang above the plants, but they are only 60watt with really low lumens(im about to go get better ones with more lumens). I started with the plants in dixie cups and transplanted them into larger 7 inch wide pots, and added a little topical fertilizer about a week ago. Since then the plants have indeed grown to a current height of 1-2 feet.
But here seems to be some sort of problem with the newest leaves on the top of the plants. A bunch of little indentions are covering the leaves and a couple of the plants have leaves turning yellow towards the bottom of the plant. Theyre around a month old now and I only began seeing these indentions about a week ago. I water the plants when the top of the soil is dry so I dont overwater, and the bottom of the pots have holes so the roots can get oxygen. I dont know whether the problem is water, light, pH level, not enough light, nutrients? Help would be greatly appreciated, as I would like to catch the problem before it gets out of hand. After all, these are my babies.
*pictures are also attached for visual aid. close-up pictures show the indentions on the top leaves as well as a picture of the yellowish leaves on the bottom of a couple plants. (2 different cameras were used so the plants look lighter in some and darker in others).

you should maybe use some plant food. maybe a lil nitrogen.

yea i think they are lacking nitrogen

also you could lower your Temp. a little bit. i found that my leaves straightend out a bit when i did. and your temp is a little on the high side if its at 85

How far away are your lights from your plants? You need to invest in some more or better lights. Do you ph test you liquids before watering? The fan should blow out from the plants. That way it blows the hot air away from them. But a mositure meter that way no guessing when to water.

When I re-planted the plants about a week ago I also used a little topical fertilizer. I just sprinkled it on top and then put more soil over it. I looked at the bag again and it says to only use 1/2 teaspoon for every square foot. My pots are at most 8 inches in width, do you think I used too much fertilizer?!

I will answer your questions when you answer mine. LOL