Brown tips and edge

The upward curling of the leaf tips can be a sign of stress caused by excessive heat. It's possible that your plants are experiencing high temperatures in their growing environment, which can negatively impact their health and development. I would recommend moving the light source further away or improving the ventilation to reduce the temperature in the growing area. Ensure there is proper airflow and consider using fans or cooling systems to maintain an optimal temperature for your plants. It's also important to ensure that your plants are receiving adequate water and a balanced nutrient supply. I hope these tips help you address the issue, and I wish your plants a speedy recovery!