Can someone confirm if this is indeed light burn?
im using an SF-1000 lamp but can't seem to find a distance/intensity chart. it's currently 55cm from the top of the plant at 80% intensity
I would say nutrient burn, not light burn.
Seedlings 24 inches
Veg growth 18-24 inches
Flowering 12-18 inches.
I have only ever grown at 100% intensity.