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@paulsgrows, late in life I run my light as close as 12-inches. When I first received the light I did some testing. HLG has a calculator that lets you convert LUX from cheap/free phone light meter. I also used the measurements from HLG and other sources. Our little board will put out nearly 1,000 PPFD at 12-inches and that is about the max for mature plants.
I don't know if too much light is the cause of large leaves yellowing late in life. I think that is mostly just the lifecycle of the plant. If the plant is no longer putting on new growth, other than buds, I think it will take all the light you can give it without overheating the plant. :v::left-facing_fist:
@BladeCutter, Thanks for that, yes same light! I just turned mine down as the plants were getting a lot of yellowing and I couldn't figure it out. So I turned down the light to try and stress them less and get them to the finish line. I always seem to have issues like this and can't tell if the light is too strong for them or if it's something else.
I sort of feel bad the rating I gave as the high itself is absolutely lovely. Right up my alley, strong indica with lovely body buzz through a vape. The flavour is great too. Should cure up amazingly.