You can optimize your next automatic grow. Next time take the germinatd seed and put them into their final pots. These pots are filled with afluffy, low fertilised MJ growingsoil. Then you have no problems with size . They love it . Automatics hate transplants and tiny pots ( they tend to stay very small and start early flower if they stay in tiny pots.
I do not think those yellow leaves are caused by light burn. In such a case the upper leaves that are closest to the light should be affected the most. In fact these lights can be put as close as 15cm to the plant.