diyled
Well-Known Member
2 of the 260w kits or a hlg 550 if you want the fancy version.
Intro to led - feedback
- Thread starter Palomar
- Start date
MichiganMedGrower
Well-Known Member
https://horticulturelightinggroup.com/ Is where the QB kits I mentioned are.
skoomd
Well-Known Member
Explain how it's not true then.
I will link a study that proves it...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4559655/
"Plants use diffuse light more efficiently than direct light, which is well established due to diffuse light penetrates deeper into the canopy and photosynthetic rate of a single leaf shows a non-linear response to the light flux density."
Using more spread out lights with the same overall intensity boosts diffusion through the roof.
And also explain how it's not true that a 70w COB at 10" producing 1300PPFD does not let you grow as close to the lights as 33w strips that dont hit 1300PPFD til 1" away from them.
Randomblame
Well-Known Member
LMFAO! WTF helped you to figured this out..?
The new QB2.0 will be top notch and pretty much the cutting edge in LED technique with the worlds most efficient white LED(up-to 220lm/w). Only a hand full lights can compare to that effiency.
A 600w HPS is ~150lm/w ...new! And you need a new bulb every year...! If you do not plan to use them vertically(to avoid reflector loss), you give away a lot of potential yield. If already HPS in a 4x 4', then vertically and preferably 2x 600w, lol!
Like here:
https://www.rollitup.org/t/strip-leds-in-the-garden-of-paradise.954799/page-14#post-14115147
diyled
Well-Known Member
What ever the wife is cooking smells very nice, im gonna go eat that and get high rather than carry on with this nonsense.
skoomd
Well-Known Member
What I thought....
What ever the wife is cooking smells very nice, im gonna go eat that and get high rather than carry on with this nonsense.
skoomd
Well-Known Member
Ill just leave this here. This is lighting 101 guys.
http://www.lighting-essentials.com/01-lighting-class-light-principle-one-size-lightsource/
Now put a nail in this coffin and just accept that cobs simply cannot penetrate as well. It's a fact. Sorry to rain on ya'lls cob parade... HLG wouldnt be designing quantum boards like they do (a big, spread out cob essentially) for no reason....
http://www.lighting-essentials.com/01-lighting-class-light-principle-one-size-lightsource/
Now put a nail in this coffin and just accept that cobs simply cannot penetrate as well. It's a fact. Sorry to rain on ya'lls cob parade... HLG wouldnt be designing quantum boards like they do (a big, spread out cob essentially) for no reason....
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Palomar
Well-Known Member
So the 260 qb or xlqb looks like a good fit. I see the xl goes up to 5k. Big thanks for the input.
respect,
pal
The Dawg
Well-Known Member
Wtf No YoYo's Hold Up Your Ton-O-Fluff?? Lmao You Say You Dont Use Cobs What Do I Spy In Da Middle????????QBs/strips can grow bigger donkey dick colas than COBs easily.
skoomd
Well-Known Member
Not my pic. I just wanted to clarify that QBs penetrate actually better than COBs do and a picture would be a good way toat least show it isn't the otherway around.
He used 80% QBs and 20% cobs in terms of wattage.
But you should read the post i made with the 2 pictures above... It's a perfect diagram showing why COBs dont penetrate as well as a larger source like qbs/strips.
Unless you believe that a COB, being an intense small light source, magically causes photons to travel further than a spread out light source of the same overall intensity in a reflective grow space.
If you can be persuaded to elaborate, I'm honestly interested in what you have to say.
What ever the wife is cooking smells very nice, im gonna go eat that and get high rather than carry on with this nonsense.
The Dawg
Well-Known Member
coreywebster
Well-Known Member
I think he ment the lights he had mentioned in the first post were junk. Not the QBs were junk
coreywebster
Well-Known Member
That diagram is more relevant to a single source light like HID, pretty much no cob guy is running one cob. 9 cobs is going to eliminate shadowing.
skoomd
Well-Known Member
Yeah I know. But you'd be surprised how direct and uneven cobs are compared to more spread light even when you use a good amount. Especially closer up.
It makes a big difference. COBs just act as mini spotlights (with a 120 degree beam lol) even at lower wattages, versus a canopy of diodes that all diffuse together evenly.
The Dawg
Well-Known Member
Aolelon
Well-Known Member
Stephen explained it in a couple other posts. After thermal dissipation, and other things it comes out to an 8-10% increase.
diyled
Well-Known Member
Well if you insist.. It was a nice shepherd's pie with steamed veg, I might make some brownies for pudding.
nfhiggs
Well-Known Member
if you run the temp up in the simulator you'll see a more pronounced difference.