Light intensity

Hi, I use the same LED panel as you. It's a panel that is intended for an 80x80 but works just as well in a 60. I'm currently using it in a 60x60. In growth the 20 first day is that you have to gradually go up to 100% otherwise I could see stress. But at this stage of growth of your plants you can put it at 100% up to 40cm without having any problem. I tested with my luxmeter which displays around 65,000 lux, the maximum recommended light. The problem must come from elsewhere. It looks like the lower leaves are turning yellow as the nitrogen is depleting, fertilizer at each watering with the recommended doses should take care of that for the start of flowering. The leaves seem to have fallen down and are stiff, perhaps overwatering? did you wait until the pot was very light before watering?