Plz Help with DWC IDK if something is wrong

I've just entered week 2 of my grow from seed and Idk things look off with the coloring to me. Temp is at 73 degrees in grow tent, humidity about 55 percent,. I've just been running regular water I'm also running a 600w hydro grow light 3 feet away from seedlings but the leaves went from standing up right to dropping just a little could someone give me a bit of advice before something happens that is irreversible (If there is anything wrong at all I could just be paranoid since this is my first grow)

Is that an led light or hps? You may have to raise it a lil more. Hard to tell but they look just a lil yellow.

What is your tap ec? If your tap water is really clean they may need a little food. Mine is .33 ec and has lots of N so I can go a long time before I need nutes.

But for the most part plants look fine.