Bleached out spots on leaf

[niteshft]

I was thinking N issue but I don't see it in the chart in the stickys. It is the only 1 of 6 plants that is showing it and all are treated the same. The strain is Full Moon and the only one I have of it. It is about 7 weeks in flower and is supposed to take 12-14 weeks to finish so I'm half way there. The problem leaves, 3-4, are near the top of the plant and my hand doesn't burn when I place it at the top, under the 1000w light.
Any help much appreciated.

 

[Locked]

Hmmm....except for that one spot the leaf is a rich dark green...sure don't look like fade which is good if she is a long flowering strain like you said.

 

[Roddy]

Did it touch the light?? I see now it likely didn't...but this looks a bit like a light burn similar to what I get often when my babes' leaves wander too close to the 400w HPS bulb I use as side-lighting.

 

[niteshft]

No, it didn't touch the light as I have at least a foot of clearance. I suppose the light might be too, close at 1 1/2 ft. It is a hooded, open light without anything under it, (no glass panel) and not vented. The strain originates from the equatorial region so should stand the heat better than typical strains, I would think.

 

[load3dic3]

it almost looks like heat/light stress IMO:aok:

 

[maineharvest]

It def doesnt look like N deficiency or heat burn to me. I have been through both and you are dealing with something else that I have never seen in my opinion.

 

[maineharvest]

Thats not what bleaching looks like at all. That looks more like what I would call bronzing and not bleaching.

 

[niteshft]

Well, I guess I'll move my light up a little. Heck, a 1000 watter has plenty enough reach for what I have going so no loss should be noticed by it. Thanks for your quick responces.

 

[maineharvest]

I wouldnt move it up. Was that coloring on the very top top growth of your cola closest to the light?

 

[maineharvest]

Any idea what the temps are at the canopy? No glass and no vent? It must be 100 degrees in there.

 

[niteshft]

Last I checked it was 82f....the plant(s) are doing great otherwise, I have great bud and trich production. This grow is making my first grow look sick. I have growth above the affected leaves but only by a couple inches and doesn't seem to be affected.

By no vent I meant not a vented hood. I have 2-6" computer fans at the top and 2-4x12" inlet slots at the bottom.