a mongo frog
Well-Known Member
That seems awful low to what i see some of the cob guys putting out. Looks like i bought a shitter..........
That seems awful low to what i see some of the cob guys putting out. Looks like i bought a shitter..........
I have no idea at that foot print, however a Phillips GreenPower 2100umol in a 5 x 5 hits 800ppfd according to gavita. Hight am not sure hut I assume 3 foot.How much ppfd does a DE lamp through out at 36 inches in a 4x6 foot print? Its the Phillips bulb 2100 umol or what ever that is, 1000 watts. Just wondering is all. Not trying to switch the talk off led, i just was wondering.
I should restate my wrong claim."Trippyness said: ↑
DIGGING UP AN OLD THREAD.
Platinum LED has the best PAR of any LED on the market inclduing Area 51.
Platinum and Kind LED k5 are by far the best lights."
Bro are you using Pled to achieve those harvests?
Has to do with reflector. Thats the main issue.That seems awful low to what i see some of the cob guys putting out. Looks like i bought a shitter..........
So the conclusion is that de are more effective in horticultural applications because they are more effective heaters? That pile of bullshit has been shoveled here a few times.Ok so I just spoke to Gavita about PPFD and a bit off topic DE vs High efficiency COB LED.
So for every 1% of light increase you get a 1% yield increase for majority of all plants including Cannabis and other flowering plants.
DE specifically Gavita 1K DE at 36 inches puts out 800+ PPFD in a 5 x 5 space coming from Gavita themselves.
They however did say that reflector has alot to do with there numbers. Other commercial reflectors may vary in results.
I also spoke in regards to COBS and they put my commercial LED uses to shame.
Plants need to maintain a certain leaf temperature and with LED you will have to heat a large space with natural gas or other.
ROI with COB on electric alone can gross 8 years.. (also did this math as well)
Seems Gavita have tested LED in large spaces and energy savings are not there in large applications plus the costs, and honestly I agree.
Gavita thinks LED is the way of the future , but its just not there yet compared to DE.
Including penatration which is for sure true.
I agree with them for large applications.
Anyways, goes to show 600 vs 800 is a 25% increase in yield theoretically if conditions are ideal.
All coming from a very high standard light manufacturer.
Case closed.
Quote from Gavita as well
Roughly these are a few examples of recommendations for a high light recipe of around 700 µmol m-2 s-1. Calculations made with 10% reflector / wall losses:
400W a) - 1 x 1 m - 1 m2 at a ppfd of ~ 650 µmol m-2 s-1
600W b) - 1,2 x 1,2 m - 1,44 m2 at a ppfd of ~ 690 µmol m-2 s-1
1000W c) - 1,5 x 1,5 m - 2,25 m2 at a ppfd of ~800 µmol m-2 s-1
In practice levels can be lower with different reflectors (open reflectors will have more stray light), older reflectors and a lot of wall influences. Other lamps may result in different densities.
a) - Philips GreenPower 400W 230V - ppf 725 µmol
b) - Philips GreenPower 600W 230V - ppf 1100 µmol
c) - Philips GreenPower 1000W 400V Electronic - ppf 2000 µmol
Trippy
DE is not more effective. Just as effective as cobs and better penetration.So the conclusion is that de are more effective in horticultural applications because they are more effective heaters? That pile of bullshit has been shoveled here a few times.
When I say penatraion I am not talking a few foot plants. 6+foot tress cobs cant compare. I am a LED guy, but its just not there yet."Better penetration" no.
https://www.rollitup.org/t/top-bin-cob-comparison.891010/page-30#post-12271142
Again, I am not here to Debate about DE vs LED. They both have their place in the grow room.What do you expect Gavita to say,we're the second best light tech. From reading this page of posts it seems like your saying spectrum trumps photon count and efficency with HPS vs LED,at least that's my take from your posts.
BTW my offer still stands Just hit me up.That seems awful low to what i see some of the cob guys putting out. Looks like i bought a shitter..........
Again, I am not here to Debate about DE vs LED. They both have their place in the grow room.
What I am saying is that 600 vs 800ppfd there is a 25% increase in yield if conditions are right.
As for DE vs COB.
They both have theyre place. ROI of COB takes much longer and electric isnt as much as once thought at high PPFD.
Like I said I love LED but I already get very low temps in my room. I can imagine needing heat in a large grow enviornment.
Ill call up my a commercial LP here in Canada and see what they say.
PPFD is PPFD. DE and COB both put out high numbers. Cooling for de and heating for COB. All comes down to your grow area and style.
Would love to see a Commercial grow with COB, have yet to see a single one in a warehouse enviornment.
If we want to debate COB vs DE more scientifically lets start a thread.
No BS just a simple debate with real science and testing.
I just dont see the ROI on COB rather than DE.
Well, near linear perhaps. But there is what appears to be valid data (YOR and Potter) that suggests a strong curve, so while Gavita's opinion (no reference data sited) is noteworthy it's not the only source of information. To be clear, my results have been fairly linear as well but I have to take it all into consideration.What I am saying is that 600 vs 800ppfd there is a 25% increase in yield if conditions are right.
I'll tell you what, I just started a DE fixture and that motherfucker heats up. I underestimated how hot they'd get. I should be fine I do have a decent size a/c but fuck the fixture runs hot when you put your hand close to the bulb. Like 10 inches away even. Love the foot print but the extra heat I could do away with.So the conclusion is that de are more effective in horticultural applications because they are more effective heaters? That pile of bullshit has been shoveled here a few times.
No doubt lol. Most don't grasp that there is in fact a big difference between IR radiant heat and cascading conductive heat.I'll tell you what, I just started a DE fixture and that motherfucker heats up. I underestimated how hot they'd get. I should be fine I do have a decent size a/c but fuck the fixture runs hot when you put your hand close to the bulb. Like 10 inches away even. Love the foot print but the extra heat I could do away with.