Brown spots w yellow and curled leaf. Just transplanted 4 days ago and in week 1 of Veg. Temps in 70s and RH in 40s using Led 24 in from top

First few pics looks like it was potentially overwatered at some point. Third pic, potential nitrogen deficiency; what is the pH & PPM of the soil runoff? 4th pic variegation. 5th pic droplets may be from nutrient solution left on the leaves. You posted this 4 days ago; how does the plant look now?

I agrees with @TnA Homegrown, some of those spots look like they could be dried droplets from your feeding, that was my first guess too. The other thing it could be is a calcium deficiency, that would be my second guess. What kind of soil are you using, what are you feeding them and are you adding CalMag? Are you monitoring PH?

A couple of other thoughts ...

The third picture looks like one of the first leaves. The very first set of leaves often die and fall off, I wouldn't worry about those ones.

In the fourth picture, those scuff like marks on the leaf could be from wind burn. Do you have a fan near that side?

Be careful when feeding nutes. I have a habit of touching leaves with the water can so I lightly mist the leaves with de chlorinated water to “rinse” them. Not saying that is the problem, but it’s something the pics remind me of. Good luck 🌱🪴🤙🏻