Brown stripes/lines

Excesses, resulting exacerbated imbalance (coz there's practically always imbalance) and pH/uptake issues. You got a good idea of your base soil? Coz it might be too nitro rich if it's got lots of manure or excess acidic components. As it is, that looks like acidity. I'd firstly throw calcium at it, and a fair amount of it, then magnesium, then sulphur (order of importance). Potentially some potassium.

Hey growmie that looks like it could be a few different things one may be overwatering and not enough aeration for the roots to have access to oxygen, it also could be the light is to close and the plants getting wet and having beeds of water magnify the light and cause burns, but I am thinking no aeration and overwatering could be the problem peace happy growing.

Hi Swedengrow sieht aus wie ph Probleme und dein Boden sieht sehr feucht aus. Aber deine Lampe sollte auch mindestens 40 - 50 cm weg sein ,ansonsten kann dein Mädel verbrennen vor allem wenn noch etwas Wasser auf die Blätter gelangt. Hoffe das hilft. Wünsch dir alles gute mit deinem Grow 👍😉