Light Bleaching under LEDs.

drsaltzman said:

Are the problem plants the same strain?
Some like a particular nutrient schedule and you can run into trouble feeding them all exactly the same.

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16 or so strains total. Worst discoloration is ALWAYS directly under the lights, no matter the strain. In a bit i plan to go get pictures of 3 of the Strawberry Garys, I have 2 with bad red/yellow. one on the outside that looks pretty normal..

Again im not saying its the only issue, or even the Main issue. Only that I being here physically, seeing the room layout, watching the room develop this problem, can see that the worst of the discoloration Is Always Worst Right Under the lights. I suppose the lights are just exacerbating other issues. perhaps light stress is amplified by Deficicencies and lockouts.

This is just one factor among a few it looks like. thanks for the input still. I appreciate the good, bad, and entertaining.[/QUOTE]

DoubleAtotheRON said:

Equipment failures happen. I guess one of my first questions would be ... why did he have you send them into flower so early? I mean.. what is that plant,... like 14 inches tall?

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We flowered them early since we were tight on vertical space, the lights are up as high as they can be and the table bolsters the plants up pretty high. I did a good bit of training and supercropping before the flip to keep them low. We are only in modified shipping containers right now, space is extremely tight. We have a big main building that is still 6 months at least from finish. The plan was SOG style, lots of smaller plants. All this was to get an idea of what to move forward with strainwise, next run 2-3 strains max.

Hopefully by then our RO water issue is better, our well water comes out around 3.6 last time i checked it before RO.

We will have to have the AC issues straight by then. Next Run I will also have the experience from this tough run.

Last thing im posting on the light issue until this experiment runs a while. There seems to be plenty of other issues to talk about.

I have a hand full of strawberry garys, one has been on the outside away from the lights, I am posting it and a couple of its sisters. these plants are on the same res, same temps, same strain, same nutes. The only difference i can make is that its placement WAS on the side. I have moved it to the middle now. I will watch and see if any issues develop, I do love a good science experiment. As a control, i will NOT move a Sex On The Beach that is green on the outside.

Will likely post some earlier pics from this grow too in another post. just for more background. I think i have some pics of when i first started noticing the yellowing too.

A picture of the empty room after i got it all together. Some early shots of some before they went bad. And some of the yellowing right when it started (pic was 4/6). last picture is a Shockwave on 4/15, now its very red/purple. looked nicer then. I should have a PAR meter in the next couple days as well.

When i got out here for this job (Mid October), there was only the Mother Container. I took another Empty shipping container; framed it out, sheet rocked, epoxy on the floor, paint/trim, made the table, took clones, eventually got running water ran from the well into the flower container. Its kinda all on me over here, and i dont much mind when things arent going to shit.. Again i am far from Incapable, just totally new to Hydro and LEDS.

drsaltzman said:

http://www.esalq.usp.br/lepse/imgs/conteudo_thumb/How-does-the-level-of-light-affect-the-rate-of-photosynthesis.pdf

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Good answer! It's all connected! Balance is key!