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Thread: Is this light burn from my LEDS?

  1. #1

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    Default Is this light burn from my LEDS?

    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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  3. #2

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    Heres a better pic. As you can see the leaves are turning a bit yellow but as you can see the leaves stems are still very green. From what ive read this means light burn, whats your guys opinion on this? Hopefully now that ive moved the lights up a bit they will be fine. Right now the lights are 35-38" away from the plants after I highered them, they were about 28-30" before I moved them (my measurement has been way off finally got a tape measure today), def too close im thinking. What do you guys think a good distance is to keep the lights from the plants!

    ibb.co/igzukv

    heres the url for image. Tried to post it here, but I keep getting error after it let me upload that first one.
    Last edited by potluck4200; 19-05-17 at 10:09 PM.

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  5. #3

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    Also yes im watering with PH 5.5 and I just starting use veg nutes on day 11 and ive been only using 1/4 plan to start using a bit more once I get this yellowing to go away dont wanna stress anything out.

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    Hi mate, welcome along to the forum

    I'm an HPS fan myself & pretty much know bugger all about LED
    It's Not What You Know, It's What You Can Prove

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    Thanks! Yeah my last grow was HPS, so im new to LEDs as well. I moved the lights to about 38-40" away from the plants. Thats about 10" away from where they were getting burned. Not sure if I moved it too much, or too little, or what. Hoping someone can chime in on what distance I should have them from the plants. At 30" they were getting the burn you see in the pictures above! Hoping to get a quick response as at 40" right now im not sure if thats too much or too little.
    Last edited by potluck4200; 20-05-17 at 12:43 AM.

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  11. #6

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    The LED make & model may help as some are more intense than others AFAIK

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  13. #7

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    BESTVA 1000w Double Chips Full Spectrum LED Grow Light are the ones I have.

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    think" hotshot" is up on the double chip leds,never used them myself but i have some vipers that will cook anything below 3ft away,they have "lenses" in them that concentrate the light apparently.

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    thanks, thats about where I have them right now about 38-40" from plant tops. They were at like 28-30" and just started to burn. Hoping this helps and its not too far of a different to quickly.

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  19. #10
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    9 plants under 370w of light is a bit of an overkill for me.

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