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Another thing one will learn by studying CocoforCannabis.com is that by the time you see leaf symptoms, photo-inhibition is already well underway. IMO, as soon as you see signs of excess light back off on the height or the dimmer, you are already in the red zone.Some one told you some nonsense!
LED are very capable of causing light stress, I can vouch for that from personally experience.
I have had bleached bud tips and not from any heat.
Throw too many photons at to high an intensity, you will harm your plants.
Light stress shows slightly differently from heat stress.
Light Stress the leaf serrations turn up and look like a crocodile/dragon teeth, the actual leaf blade remains uncurled!!
Heat stress the whole leaf folds along it's length otherwise known as taco-ing!
Cannabis likes between 25W and 50W per foot square anything over 50W per foot square, is wasted light and energy and can actually harm your plants, rather than help them grow.

more like by the flat bed.Gonna buy your puppy food by the truck load or cargo van?

I once met a cat like that. It used to sidle up to the guest (me, boyfriend of the female owner), purr, rub my leg and generally show all manner of interest and affection before rolling languidly onto its back for a belly rub. The uninitiated would then rub her belly. I knew better after making that mistake exactly once. There was blood involved, and it wasn't the cat's.

My male cat is the same, he flops down belly up and dares you to rub his belly, but when he lashs out with his daggers you know it, or at least you will realize it while on the way to the ER for stitches,,,,,,,,,, he is a svelt 18lb Tiger cat that people think is some kind of wild cat.....I once met a cat like that. It used to sidle up to the guest (me, boyfriend of the female owner), purr, rub my leg and generally show all manner of interest and affection before rolling languidly onto its back for a belly rub. The uninitiated would then rub her belly. I knew better after making that mistake exactly once. There was blood involved, and it wasn't the cat's.
Weird cat. The other thing it did was snuggle up to the guest on the couch, working its way higher and higher until it could suck an earlobe.
As I mentioned, weird, and you did definitely not want to do the belly rub.![]()

I have tops less then 1/2” from my diodes with light on 80% and no issues whatsoever!You can very easily overdo it with led's! Another one of those growing myths!