Ppfd :-)

[Kingrow1]

If i had been an led grower id still have touted hps - i wouldnt find a different answer just because of my personal preference. Look at its spectrum and then the bud it grows.... thats not shit so i simply looked at why something so shit has such a great ability and found what most like to deny about spectrum.

Fucking light has more green and such than chlorophyll a and b peaks at both ends of the spectrum. Ye who bash syltuff without an oz of consideration for the science at play. You know your kind spawned and ripped the market with og blurples... Thanks w bunch real educated not full of hate.

Poor old hps lights that still go strong today....

 

[christopher jordan]

you might be right. i'm a bad listener so no worries.

I dont doubt but in a year peeps be saying your lights shit, just a bad market and hype

You mean like your opinion is shit . lol

 

[Kingrow1]

You mean like your opinion is shit . lol

Opinion matters not - its certainly not weakened sales of hps or blurple here. Can just quote fact like that led has yet to kill anything really - s'whys that?

Waiting for a fact not opinion now you upped the game

 

[rkymtnman]

If i had been an led grower id still have touted hps

If ifs and buts were candy and nuts, it'd be christmas every day.

i'm guessing your standards for good weed is much lower in Wales than here in Colorado, home of the Rocky mountain high.

 

[Kassiopeija]

So you now know what the best spectrum for mj is...

what evidence do you have that cannabis is *much* different than normal C3 plants? the spectrum of the two phytochrome receptors is shown in some of your university literature (or wikipedia/google)... so they did alot of comparisons over quite some time.... I bet these phytochrome receptors is build from genetic material that is *hard preserved* - it'll be the same in most plant.
BTW plants, just like an yliving thing, can adapt to its surroundings, and that's surely to say from light as well.... I've seen this by myself in action - winterveged plants under weak CFL and into outdoor direct strong spring light - massive UV light leafburn - all leaves got bleached and subsequently died, wrinkled dry. All the new grow could cope with the now ever groeing sunlight.
Plants are the general mastersythesizer of biomatter, don't ask me how you spell it, they just build some counter towards the radiationa nd are being done with it. Some of that stuff does actually increase aroma and taste of your buds.

 

[Kassiopeija]

Fucking light has more green and such than chlorophyll a and b peaks at both ends of the spectrum.

that's because only recently few years ago or whatever.... scientist discovered leaves will absorb green light, just reduced. And the reason why it does it like it does, is because in that scenario, the total amount of absorbed photons DOES INCREASE. Because, IF greenlight does usually surpass the first few layers of phytocrome/cells, it will rather be absorb by phytochromes in the inner of the leaf where your blue/red won't be able to reach. The plant gains more total area where it can absorb photons - at the cost that some green will be lost, that's a beneficial tradeoff. Evolution is tough shit

edit:
so that's why in LED they nowadays they offer youa lso normal daylight colors 3500k 4000k plants grow just fine under it. However, I actually like to have the flexibility of countering internode-length with lightcolor (flowering stretch) but as said, you can do that with LED, too, so what gives?

 

[Kassiopeija]

And why specifically do you think that the physical laws in terms of lightstrength/lux do have something to do with the power of that light shine through into the middle of the canopy? while it's true that sometimes the bigger lamp is more efficient, but the bonus of a multisource light can hardly be denied. you can also move the plants closer to the light, and this is a bonus under certain conditions.

 

[Kingrow1]

Go down a few leaves in the canopy and you might find green light exists at higer levels than above and thus the net absorbtion can be greater than your chlorophyll peaks - I dont atest to know the answers but some are and thats concerning in a very complex subject with far too many considerations

that's because only recently few years ago or whatever.... scientist discovered leaves will absorb green light, just reduced. And the reason why it does it like it does, is because in that scenario, the total amount of absorbed photons DOES INCREASE. Because, IF greenlight does usually surpass the first few layers of phytocrome/cells, it will rather be absorb by phytochromes in the inner of the leaf where your blue/red won't be able to reach. The plant gains more total area where it can absorb photons - at the cost that some green will be lost, that's a beneficial tradeoff. Evolution is tough shit

edit:
so that's why in LED they nowadays they offer youa lso normal daylight colors 3500k 4000k plants grow just fine under it. However, I actually like to have the flexibility of countering internode-length with lightcolor (flowering stretch) but as said, you can do that with LED, too, so what gives?

 

[Kingrow1]

Probably, were black market and i live in the most impoverished area away from cities and such so theres a lot of shit weed about. Many cant crack it in todays industry and broscience, ive had to help a few dry after they asked me why their buds so damp.

Mainly stardog here, why is your area flooded with good weed? I envisage usa as a good holiday for the 420 tourist thesedays

If ifs and buts were candy and nuts, it'd be christmas every day.

i'm guessing your standards for good weed is much lower in Wales than here in Colorado, home of the Rocky mountain high.

 

[Thundercat]

Why am i making adjustments for leds.... I dont seem to for cmh. What are you missing and then having to add back that a normal light dosent so that i need to change my indoor environment?

Im just following what growers done for a long time yet now everythinga different because of a light... lol dude just hear yourselves, its like that whole ked needs extra calmag troll bait that did the rounds

This site is still in the realms of reality right?
.

If you make any changes in your garden (different plants, lights, ventilation) you have to make adjustments for them dude. Lighting being a pretty obvious one, somethings require more adjustment then others to achieve ideal growth conditions. The fact that you can't understand that is sad honestly. With something like switching to CMH the adjustment should be small if needed at all, since its still an HID light.

Making the appropriate environmental changes also seems to have eliminated the whole extra "cal-mag" issue for the growers I've seen doing it around here.

 

[christopher jordan]

what evidence do you have that cannabis is *much* different than normal C3 plants? the spectrum of the two phytochrome receptors is shown in some of your university literature (or wikipedia/google)... so they did alot of comparisons over quite some time.... I bet these phytochrome receptors is build from genetic material that is *hard preserved* - it'll be the same in most plant.
BTW plants, just like an yliving thing, can adapt to its surroundings, and that's surely to say from light as well.... I've seen this by myself in action - winterveged plants under weak CFL and into outdoor direct strong spring light - massive UV light leafburn - all leaves got bleached and subsequently died, wrinkled dry. All the new grow could cope with the now ever groeing sunlight.
Plants are the general mastersythesizer of biomatter, don't ask me how you spell it, they just build some counter towards the radiationa nd are being done with it. Some of that stuff does actually increase aroma and taste of your buds.

That happened because the plant wasn't hardened off.

 

[Kassiopeija]

Go down a few leaves in the canopy and you might find green light exists at higer levels than above

no, I really don't think that light (and regardless of its color) can get stronger (or exist at higer levels to use your fancy terms...) with additional distance covered.
And twice not if it even has to cross leaves.

 

[Kassiopeija]

That happened because the plant wasn't hardened off.

yeah, it wasn't used to UV. Next year I exchanged CFL for MH and it worked much better.

 

[PJ Diaz]

I'm still running 600w hps, mainly because that's what I have had for a while, bulbs are cheap, keeps the room warm in winter, and I'm not ready to bite the bullet just yet on upgrade. One issue with buying expensive LED units, is that you will have to replace them with another expensive unit in 10 years. I think likely the best option is a combination of 315w CMH and good COB units, like the Cree 3590.

It seems to me that failure with LED is mostly associated with the grower not understanding that they need to give the plant a different feed because of the different environmental conditions.

 

[christopher jordan]

yeah, it wasn't used to UV. Next year I exchanged CFL for MH and it worked much better.

I think more because of wind burn and low relative humidity.

 

[Kingrow1]

If i take 600umols of one light then 600umols of another light your saying i need a different set up - Dont think so unless one light is spectrum poor and inefficient and hence why from blurple to now leds have struggled

If you make any changes in your garden (different plants, lights, ventilation) you have to make adjustments for them dude. Lighting being a pretty obvious one, somethings require more adjustment then others to achieve ideal growth conditions. The fact that you can't understand that is sad honestly. With something like switching to CMH the adjustment should be small if needed at all, since its still an HID light.

Making the appropriate environmental changes also seems to have eliminated the whole extra "cal-mag" issue for the growers I've seen doing it around here.

 

[Kingrow1]

So leds make it not like outdoors....? We need to adjust for some lose of something missing between the outdoors and leds now? Were not back to mythical cold light again

I'm still running 600w hps, mainly because that's what I have had for a while, bulbs are cheap, keeps the room warm in winter, and I'm not ready to bite the bullet just yet on upgrade. One issue with buying expensive LED units, is that you will have to replace them with another expensive unit in 10 years. I think likely the best option is a combination of 315w CMH and good COB units, like the Cree 3590.

It seems to me that failure with LED is mostly associated with the grower not understanding that they need to give the plant a different feed because of the different environmental conditions.

 

[christopher jordan]

If i take 600umols of one light then 600umols of another light your saying i need a different set up - Dont think so unless one light is spectrum poor and inefficient and hence why from blurple to now leds have struggled
[/QUOTE
That's right Hps is inefficient. Hps maybe 140lm/w vs Led at around 200 lm/w.

 

[Kingrow1]

You misunderstand but easier if you tell us what happens to green light as it passes through a canopy and even more so what spectrum is measured below canopies? So far you just talk red/blue and that is only a small slice of what plants recieve.

I also note for your intrest that blurple red blue lights were not very effective without green.

Anyone touting led as the best needs explain ehy a little better than just ppfd (kinda why i nay wanted led ppfd data and their trolling).

no, I really don't think that light (and regardless of its color) can get stronger (or exist at higer levels to use your fancy terms...) with additional distance covered.
And twice not if it even has to cross leaves.

 

[christopher jordan]

You misunderstand but easier if you tell us what happens to green light as it passes through a canopy and even more so what spectrum is measured below canopies? So far you just talk red/blue and that is only a small slice of what plants recieve.

I also note for your intrest that blurple red blue lights were not very effective without green.

Anyone touting led as the best needs explain ehy a little better than just ppfd (kinda why i nay wanted led ppfd data and their trolling).

Green light penetrates the canopy. I never mention red and blue, or a blurple. Daylight spectrum 3000k to 3500k leds have plenty of green.The did grow on the space station with red and blue. Dont know why they didn't take a green one with um.ll You could check out The bc blonds 5.1 pound grow on youtube. Uses two 680 gamechangers. Slowly ramping up the lights going 50% power til week 3 then 75% til week 5. You want to do the math with the changes and tell me the grams per watt, and if you can match that with 2 600w or 4 315's?