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I'm trying to watch this more closely at the higher temps (70F) too in the future. Seems like 0.4 vpd is too low and slow. @ 70F that is 80%H. 0.6 also, @70F that is 75H. I've probably been there at the start. Does anyone know what oxygen's role is in it? I'd think actually air movement...

Cool, never heard of shade avoidance syndrome or the term horticentric. I am wondering is that a typo or what do you mean "un lanace"?

All good points. Another reason to leave them is they can help you identify nutrient problems. Yellow leaves can be normal, but can also be due to issues such as nutrient deficiency or ph imbalance. If there is a problem and you cut them off, then the problem would likely migrate to other...

Yes, I think light makers are very liberal with the term full spectrum. And leds dont seem full at all. They just combine a few color lights which the color is actually spread a bit around a wavelength and they kind of overlap to create a wider spectrum but full would be flat all the way...

Interesting. Has me thinking how plants evolve like further off from equator spring would actually shift light more to red side I think all other things being equal, but blue would be increasing every day. But all else is not equal, because rain clouds in spring diffuse the light color and I...

I'm just learning here too, but it might be the proportion of red to blue, or red to green, etc. So you may want some red but not a majority of red. It probably depends a little on the plant too. Like equatorial sativas may be even worse under higher proportion of red for young plants, which...

So that is a lot higher in the red side. Maybe you're right about that being the problem.

If this is the case, the 3 options of Barinha led full spectrum have more proportion of red to blue per the link above. But it seems lots of different charts for fluorescent spectrum. Is the above specifically for a Barinha? Just checking, because if I search a general descriptor like 6500k...

They show 3 kinds of Full Spectrum LED T8's here: https://barrina-led.com/products/t8-led-grow-light-3ft-30w-full-spectrum-linkable-reflector-design-6-packs-qi30 do you know which one you have? Yellow color, 5000k white, or pinkish white?

These are 30 w, he said he had 24 w, same? @Gsplover11, how many watt total are you 6500k that these plants prefer? It's hard to understand the problem given you said you have 48w of the led T8, but you didn't say how many watts of the fluorescents.

Just trying to clarify, you have 48W of T8 led total, and how many watt total is your white light T8s? I don't have any answers sorry, but I'm watching to learn and see what happens. My feeling is fluorescents create nice even diffused light similar to a cloudy spring day which young plants...

Better than working for the man.:cool:

Oh wow that looks good. that's an auto? I was just saying don't use an auto in a window because I'm under the impression you want to give it light for up to 24 hrs a day to maximize output and figure a window is lucky to get 12 hr light. Didn't read the whole thread just responded to your...

But Samsung has the people and the wherewithal and they would come out with that better more efficient and cheaper thing not someone else and what they are going to do is eliminate high paying jobs to engineers who deserve it and those people are going to say fuck it and hang it up and maybe...

My take is IBM are a shell of what they used to be. They used to be #1 and employees all ego as 'only the best of the best get to work for ibm', and now they are afraid to admit they work for IBM. Now IBM moved into big 5 accounting auditing firm which was PWC I believe, which has nada to do...

Right I sure don't know LEDs like super homegrowers do but I made a diy my way and just used what people say are best which is Samsungs. I guess they eventually crap out and you need a new one but probably won't be a while. I think their bigger markets are non grower applications and one thing...

Just a guess. I don't know but I would think the leds have positive cash flow so someone will pay something for it and Samsung aint stupid they are going to sell it if they can and someone will buy it if it makes money and then probably ruin it using cheaper materials, etc. But if Samsung...

these pics must be terra bytes I can't wait that long...

Same

I'd guess their LEDs wont just stop, but they will sell the LED business and someone else will make them as they are today without improving them any more.