LED and BUD QUALITY

[greyfader]

@greyfader. I think you may find this new umbrella style led interesting. $469 shipped.

hey buddy! good to hear from you! yes, that's very interesting. i have been thinking about parabolic or hemispherical mounting frames for leds for a while.

i have mentally designed an 8-legged spider-looking fixture with a central hub that would allow adjustment of the arms from an almost perfect hemisphere outward and upward to a shape that resembles a seagull's wings.

maybe 5' in diameter fully extended.

when using a flat-faced fixture with 120-degree beam angle diodes we get lots of overlap but imagine how a curved mounting surface would focus that even further.

so if you could focus the light energy on the plant better you may be able to use less of it.

 

[Ca++]

Holy repost batman. That Robin Hood geezers stuck in a time loop

Using this pic again, I'm going to look at ambient co2 level results.
600ppfd is a common target, and runs some plant around 30%, according to the graph.
If you take 200 away, leaving 400 on the top, we still get a 25% growth potential.
If we then use that 200 to light up one side, that side may grow at 15%.
The net effect, is loosing 5% on the top, to gain 15% on a side.
The more mathy among us will see the top loose a 6th, but the side then produce half of what the top would of under the full 600. Net gain, a third more growth potential.

Even it my maths sucked hard, there must be some gain.


In the real world, my auxiliary lighting produces more grams per watt than my main lighting. My yields are impossibly repetitive, and so adding the auxiliary lighting had a very defined gain. The first paragraph says it all. My canopy was already performing well, and so lighting up any other part of the plant at levels below 600, was more efficient light use the the canopy which had over 600. I actually took some shaded shaded space to around 250umol in the weigh-in tests. Making scrap into bud. In a sea of green or scrog, most people are only lighting one side of the canopy. Hobby or Pro, it's odd that we are not interlighting our crops somehow. Instead, many just let the bottom die away.

 

[jwm]

Show me, show me a pic like i showed u under LED... full trichome heads across the entire flower structure leaves etc... sorry, you wont find one.
LED are great dont get me wrong bro, they are not fitted to flower anything, not stuff that need the highest intensity ever, science says to up the ppdf when your flowering, but science also told u not to go over 1000 ppfd as its not necessary, when you dont go above and beyond (in light intensity) you will get poor resulst, no matter the light source, and LED prove that, just look, leave the science papers in favor of your eyes for a sec.

 

[jwm]

Show me, show me a pic like i showed u under LED... full trichome heads across the entire flower structure leaves etc... sorry, you wont find one.
LED are great dont get me wrong bro, they are not fitted to flower anything, not stuff that need the highest intensity ever, science says to up the ppdf when your flowering, but science also told u not to go over 1000 ppfd as its not necessary, when you dont go above and beyond (in light intensity) you will get poor resulst, no matter the light source, and LED prove that, just look, leave the science papers in favor of your eyes for a sec.

Disagree.

 

[greyfader]

Disagree.

those are totally ruined by the leds! you should send them to me for disposal.

snakedope is gone from icmag so you won't get any response from him. nice flowers!

 

[jwm]

Is there a secret way to grow under LEDs that no HID guy knows about ?
Are we missing something ? Who does know how to grow with LEDs at all ? the mfg ?
If you need a learning curve to adjust to a product that claims is superior to any other that to me is a red flag and Bro Science excuse at best, same as "Too much light" concept.

Amazed that people give opinions as facts. LED rocks. The right LED of course.

 

[Hiddenjems]

To be honest, i was sceptical too about led spectrum, bud density, thc content. But after spending several months analysing what the spectrum actually is and how plants react to it I understood that LED is the deal, where you can adjust every colour/spectrum by your needs (or lets say for specific plant variety/-ies).
IR / UV lights can be added separately (to maximise thc production).
Tried it by myself and was amazed, cheapest one could find on amazon and was amazed how frosty plants become only on week 3. Never seen this with hps lights. And that is cheapest led diodes which are old generation and etc..
So there is no need to cry about thc levels drop, unless you make 1:1 (led:hps) grow test and after send buds to lab for detailed test for thc/cbn/cbg etc. together with terpene profile and make this "rumours" come to end. If I would have possibilities to make it, would do it right away.

HPS lights produce tons of green spectrum, which is irrelevant for plants. Thats a fact.
Leds produce the colour wavelengts which is designed for.
Some of diodes produce specific spectrum for example 620-625nm, others go deep red 650nm. And they do not produce waste spectrum which consume energy and produce unnesecery heat. They are designed like this.
Other type of led are more broad spectrum, they produce nice yellow / blueish lamp and are intended for daily light for hoomans.
Those will have a bit of green spectrum, because light colour comes from red green blue mixture.
So to get yellow lamp we need a bit of green, but very minimal amounts.
In grow led diodes this is minimised as far as I checked brigdelux, samsung and dozen of other diode datasheet. (not specifically for growing, but still has much lower amounts of green light in them).
So only looking at at elimination of wrong spectrums led lights are at least 30% more efficient.
Looking at new samsung 301b/h and even next gen diodes which can push >160lm/w I can really say - HPS times will come to end, unless you enjoy spending hundreds of $ for AC and waste spectrums.

Example: https://led.samsung.com/lighting/mid-power-leds/3030-leds/lm301b-evo/
Luminous Efficacy: 230 lm/W
Even they are lacking a bit of 620->625nm reds, making led light they can be easily added. And that is the point and biggest advantage of led lights.

Biggest disadvantage of LED is dependence on temperature. The hotter led is running, the less efficiency it has. And with more temperature - colours starts to shift, it means i can become not what you want to get.
So buying cheap led lights without heatsinks and active cooling fans is the problem.
Don't do it. Spend 100$ extra, but buy a quallity thing from brands which understands what they are doing.
And let your plants and wallet breathe more easily.
Cheers icmag community.

Also spectrum analysis.

Plants evolved specifically with two different spectral peak inputs that do not match the natural outdoor spectrum peak in the green region, but do absorb 90% of green light.

The article describes how this setup is more productive than matching the spectrum to the absorption peaks of chlorophyll a and b.

https://www.science.org/doi/10.1126/science.aba6630

 

[Mars Hydro Led]

If LED grow lights are going to be in your plans, take a look at our lights. And we have upgraded most of the lights to smart bluetooth models, you can easily control your planting through bluetooth or WIFI.
www.mars-hydro.com

 

[chiesesganja]

I think...there are some heads on my buds right?? Sanlight evo

 

[Hammerhead]

Mars/HLG LED.

 

[Crooked8]

I think...there are some heads on my buds right?? Sanlight evo

Lol
Yes they look terrific

 

[Crooked8]

Day 26 here, moving right along. I have the bars up to 95%, ill be at full tilt by Sunday. Co2 at 1100ppm. They are drinking and eating like crazy. Seeing some chlorotic leaves on my heavier feeders like Mac and White Truffle. Ill up the feed a touch at res change but i wont be exceeding 1.4-1.6ec this round. Even at 1.8 as a max last round we saw a touch of nute burn. Hard to dial it all with 8+ strains and at such high environmental demand. Vpd is around 1.2-1.4 between ac cycles. Ill keep it there most of the run. Maybe push a little higher at the end and drop temps a touch too.

 

[chiesesganja]

Very nice result, i also had 16 plants under LED panels, 15 of them had only trichome stalks, almost no glue or full matured trichome heads, 1 of them was a duckfoot and was looking funky from the beginning, turnes out his the only one who had trichome heads, terps also, but still, not enough, not mature enough, not good overall.

Yours look killer, i hardly see people get to those kind of results under LED.
what do you think you did that got to this result under the LEDs, and do other strains u did perform the same like this ?

Maybe u should change your led ?

 

[chiesesganja]

Meh... science says the most fragile monoterpenes begin vaping off at 70F. Science also says the more complex terpenes and cannabinoids are built from/on these monoterpenes.

My experience says higher than 20%'ish RH grows much lower quality cannabis, hps/led mskes no difference.

Take it or leave it, and I have yet to come across anything which comes close. Except the one source of eye opening, epiphany level quality. lol

true! They don’t want big plant ,they just want big bud .

 

[chiesesganja]

Results led

 

[Birmaan]

Sanlight evo - 58 flowerday

 

[Douglas.Curtis]

Very pretty flowers and lights. I would have chopped that last flower a few days ago.

 

[Birmaan]

Very pretty flowers and lights. I would have chopped that last flower a few days ago.

Thanks my friend, I'm into ripe fruit, it gets another week

 

[Douglas.Curtis]

I hear you, there are times I really need that sleepy stuff.
Lately though I've had overripe for so long I'm sick of it. lol Soooooo sleeeeepy all the time, even after using mass caffeine. That last flower makes me tired just looking at it. lolol

 

[Birmaan]

I hear you, there are times I really need that sleepy stuff.
Lately though I've had overripe for so long I'm sick of it. lol Soooooo sleeeeepy all the time, even after using mass caffeine. That last flower makes me tired just looking at it. lolol

Haha ok I hear you too, but the good lady takes it quite well, 30% amber and she still gets more high than stoned.

Try mate or ashwaganda instead of caffeine.