again

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Heat stress I don't know. I think it's rather hard to get from LED's, but there are a whole lot better growers who might tell you otherwise, ask around. But I would say actual light stress is more of a concern. I used to grow under HPS and back then HEAT was the issue, but now you can actually throw too many photons at a plant. Technology is wild, it hurts my head thinking about it.

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BasicMember I thought it was because of the heat from the light that cause my damage. Thank you for informing me it is more likely light stress. I raised the light to 24 inches away from the plant. I just love growing this fantastic herb.