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never heard of a walk-in closet?

I just wanted to respond to this statement. When you say LED, are you talking about the individual chips, or the fixture as a whole? Diodes have limitations just like any other light source, but what “best” LEDs are you referring to? Most grow lights on the market are using similar...

Sorry, I was referencing the nanometer coverage more than the color temp. Spectral distribution is obviously somewhat different between the two light sources with CMH having a higher proportion of red in the spectrum. Hortilux 1000W Blue Phillips Agro 315W 4200K

I’ve actually never been that impressed with HPS grown flower. It can yield really well and grow larger nugs, but I was growing the same strains for a few years before I made the switch to 3000k CREE CXA COBs, and my buds were more dense, trichome laden, and had much better aroma under the LEDs...

Honestly, the healthiest growth and happiest looking plants I’ve ever had indoors were under Hortilux Blue 1000W. They didn’t have as much output as HPS, but the plants always responded better to the Blue spectrum. It just would have needed to have like 25-30% more output and would have been the...

You’re very welcome grower. I’ve also caused photoinhibition a number of times, and had to do a whole lot of reading and sort my problems out the hard way. I just try to remember that everything about growing is super dynamic and interconnected, especially when trying to diagnose issues or come...

I believe that it’s the phosphorus coating on the inside of the glass that actually scatters the photons after it absorbs and re-emits them. Glass typically will reflect/refract light, but the photons don’t lose energy like they do after transmitting through a particle like phosphorus. That and...

In regards to blue/violet/uv, I’ve had a suspicion that the reason people see somewhat negative reactions with “high”amounts of these photons in artificial light sources, is because of the sharp light points of the beam angles. In nature, a decent amount of the received blue and UV rays are...

I'm not sure where or what this particular spectrum application it is used in, but it doesn’t have the traditional cyan/lime green dip that most of the standard chips use and covers the blue/green end of Chlorophyll absorption much more broadly. I think it would be super interesting to pair...

The destruction of leaf tissue you are describing is photooxidation, also described as photo damage or solarization. The light avoidance you are describing is physiological leaf roll, which is a heat/drought/high light response. Most leaves can reposition their chlorophyll pigments, sometimes...

I just wanted to clarify this for you. There could be so many different factors as to why you could have a phosphorus “deficiency”. This doesn’t necessarily mean that there is not enough of the mineral in the soil. Purpling is just a symptom of a cause. This is outside the scope is this thread...

@Delps8 theres a few takeaways I’d like to brush on from that video. When he mentioned that Spectral Quality is over emphasized (around the 25:00min mark), it was in the context of cost effective growing and yield. Meaning to get the most plant growth, spectrum is less important than total...

Plants grow under light more so than not. Many studies have shown that increasing DLI has a positive correlative influence to plant growth, when mitigating stress. I’m proposing a cloudless season, where irrigation replaces rain. Again this hypothetical is in a controlled growing environment...

You bet! VPD was a game changer for me years back once I understood how it all ties into the photosynthetic process. Cleared up a grip of issues that most would have to told me to “just use more cal-mag, because…. LEDs” :lol: This is probably going to be controversial, somehow a bunch of my...

The simple observation that every time the light was increased the plants became more stressed. And if you read again what I wrote: “looks like the plants are receiving too much light for the environmental conditions, likely a VPD/transpiration issue.” Hopefully that clears that up. Could...

looks like the plants are receiving too much light for the environmental conditions, likely a VPD/transpiration issue. I would raise your ambient temps into the mid 80s and let your soil dry out just a hair before your next irrigation cycle. I would also aim for 50+% for your humidity. Look up...

Natural Conditions are not what I’m proposing. I’m taking about optimizing the controlled grow environment using as close to a “Sunlight Spectrum” as possible (this also means a variable spectrum). This means if plants get stressed out above 1800+ ppfd, then don’t allow the plants to receive...

From Wikipedia’s definition of evolution regarding natural selection: Evolution by natural selection is established by observable facts about living organisms: (1) more offspring are often produced than can possibly survive; (2) traits vary among individuals with respect to their morphology...

Saying there would be no benefit or measurable plant responses from a full changing spectrum compared to a control spectrum is a bold statement, considering that’s what plants evolved under. I personally don’t think it would be difficult to achieve. There are already plug and play light...

I just want to know how this conversation will lead to growing better weed? Or making better LED lights?? Does the atmosphere as a whole refract and disperse light like a glass prism? No. Can individual particles in the air refract and disperse light like a glass prism? Yes. See ice crystals...