yellowing

It's light burn. And possible could use some cal mag.

Too much light. Backup your light. LED’s are extremely powerful

I don’t see a diary for this so I can’t give you a better answer. It looks to me you either have some nutrient lock out, your ph is off or your feeding schedule is not accurate. Start with flush ph’d water 6.0-6.2 let dry out sufficiently and start on half strength nutrient schedule. Make sure you refer to the manufacturer recommended schedule.