First real grow

Iv got 2 plants in a 2ft by 2ft space under a Mars hydro ts 600 in biobizz soil and iv noticed a few of the bottom leaves changing colour down the side to a pale green and curling a little pit and help would be appreciated I know the pics arnt the best but my camera won’t focus properly and they are about 3 weeks in veg

And I know some of the leaves in the background are crispy but that was where the light was too close