Light stress & burn on plant after switching to LEDs

[chib]

Does this look like light stress or something else ? I just switched over from cfl to led and have it 20 inches above the canopy. Switched 3 daysago

 

[Green thumb lou]

Check out my links in my signature about plant abuse. and also I have read that leds make a plant calcium hungry. I have to use calmag with mine. Hope this helps a tiny bit