Grape walker kush

Hello and welcome. Switched from 18/6 to 16/8. DLI was approx 35 this week. DLI was at 40 last week but taller plant wasn’t loving it so here we are. Not much improvement since last week thought tbh.. I’m guessing the damage may be already done and now I just have to work with what I’ve got and hope it doesn’t get worse.. on a positive note, the frost is coming in quite heavy and looks pretty! Microbes: Not this week Light: 60% @ 40cm @ 16/8 Humidity: 55% - 60% Medic grow Mini sun 2 - 240watt LED with v1 full spectrum : https://growdiaries.com/grow-lights/medic-grow/mini-sun-2-240-watts https://medicgrow.com/collections/all/products/mini-sun-2-led-grow-light-medic-grow?variant=40327484735597