This is not my first grow however my first time using LEDs. I have 9 big bang autos in a 6x6x7 grow tent with 2x 1000w LED grow lights in the tent. I have 4 under 1 light 4 under another with 1 in the middle of the groups of 4. They have been super super healthy thus far, but yesterday I started noticing some yellowing on the leaves on some of the bigger plants, and now today its even worst. After doing some research im pretty sure its light burn, so I moved my lights up about 6" this morning so I think its going to fix the problem. I had been keeping the lights 40" above the plants and they have gotten taller and I forgot to higher them (didnt think about it so soon there growing fast these) so now that are at about 40" again so we will see if the yellowing goes away. Either way I wanted to post some pics here to get your guys opinion to make sure its light burn. I know its not overwatering or nute burn, and from what ive seen and read about light burn the leaves turn yellow but there will still be green stems or whatever on the leaves which is exactly how mine are its kinda hard to see in the picture tho. Its def not nute burn or overwater because ive seen those symptoms before. This is like yellowing but the stems of the leaves are still very green, and its only happening to the taller plants just now. Also I keep my temps 70-72 lights off, 78-80 lights on, humidity ive been keeping at 60, will lower this at flowering. I also water every 2 days for now, im using mini rockwool cubes in 3 gallon buckets. These are currently at week 2 as of today. Heres a pic of one of them, tried to upload pics of multiple but for some reason its only letting me upload 1 pic here on the forums.
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