Changes at Timber Grow Lights
- Thread starter RainDan
- Start date
Or_Gro
Well-Known Member
Whoa, i’m not dissing you, i’m dissing people who blame their problems on their lights (or dis other people's choice of lights). Competent growers use their brain (like you obviously do), not “the blame”.
Lots of ways to grow a weed...,
Or_Gro
Well-Known Member
You are an ass!
Or_Gro
Well-Known Member
You’re another one! Wasted dna.
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Yodaweed
Well-Known Member
https://cdn7.bigcommerce.com/s-f61b0/images/stencil/500x659/products/805/2714/PPFD_75W_SINGLE_COB__74869.1515705417.jpg?c=2
Single COB output @ 75w in a 2x2 area, massive hotspot. Put two of those together you got two massive hotspots. The more you spread the light the less hotspots. It's why a lot of LED grow lights are made from lots of low power diodes.
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Or_Gro
Well-Known Member
Understand the point you’re trying to make, but 800-900 ppfd is what you want during flowering, but across every inch of your growspace footprint, which is what great qb fixtures do, ala dan’s!
The real prob with that diagram is only about 1/5 (10”x10” center) is intense enuff to support flowering.
Veg: 300-600 ppfd
Flowering: 600min ppfd
Checkout pg 16:
http://fluence.science/wp-content/uploads/2016/09/High-PPFD-Cultivation-Guide-9.27.16.pdf
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wietefras
Well-Known Member
Are you kidding me?
- That chart is for a COB with a 90 degree reflector!!!!!!! With a 90 degree reflector the COB would need to be at 31" to get a proper uniformity not 18" as with a bare COB, let alone 12".
- Even with a bare COB, 12" would be too close for a single COB. Or board for that matter. So that's the incorrect height anyway and of course you will get poor uniformity.
- How do you even get an elliptical spread with a single COB?
Still, here goes, a chart for a single (bare COB) at 12" over a 2'x2' (no reflection):
Lines are at 20% ranges. So center white is from 100% to 80% etc. I used no reflection this time for a worst case scenario.
and same for a single board:
It's slightly stretched, but the board is just as unusable at that height.
The only thing you wrote that makes any sense is this: "The more you spread the light the less hotspots". That's exactly why 4 COBs spread out at 12" from each other are so much better than one COB or one board in the middle of the same area:
Even with no reflective walls that would be a usable configuration.
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Or_Gro
Well-Known Member
I get sick of this crap. Same bs that light companies do, if they do anything at all.
Post the friggin ppfds!
That's what matters to the plants!!!
Or_Gro
Well-Known Member
What the fuck are you on to douchebag? I posted my ppfd’s.
I never said i’m the best grower of weed. I consider myself competent.
I am a commercial grower of another crop, and there i am a pretty fuckin damn fine grower, and my customers pay top tier for it.
But you obviously are lacking in something other than assholeness!
I would feel sorry for ya, if you weren’t such a dick!
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Or_Gro
Well-Known Member
Yes, for presentation purposes they have been divided by 1000! You are such a frickin dumbass!
Post your nums, so someone can replicate or call you on it.
I stated mine and where the details could be found.
Quit digging yourself a deeper hole.
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wietefras
Well-Known Member
What's with the hysterical swearing?
I simply showed that with COBs you can indeed do the following better than with boards:
I simply showed that with COBs you can indeed do the following better than with boards:
While you keep attacking this (ie Dan) with unfounded statements like this:
ps If you want PPFD instead of percentages then assume the white circle in those charts is 800umol/s/m2 to 1000umol/s/m2 and lower the range by 200 for every shade darker.
oi retardo, he posteted the (simulated?) light beam of ONE board, your numbers are from a combined amount of 8 boards. yet, your boards are still bound to the same beam angle of one little lm561c:
now, what do you see in this diagram? and why are you thinking this is somehow different to a typical cob?
durbanblue
Well-Known Member
And we have a winner.
DET—PDX
Active Member
Back to what Dan was saying... about the cobs.. I think it’s better for SOME to use no lenses on Cobs and go bare. The reason is simple, for me, in a 5x5 i have no reason to spread the light with 6 cobs on the Vero Redwood. Lenses will reduce overall ppfd of light being absorbed by plants because they must refract it to some degree. According to dan it’s about a 12% intensity difference, and at Timber they certainly measured that statistic. You can argue semantics about percentages versus ppfd all day but lets look at the generation of the light, and how it is being relayed to the plants. A lot of diode analysis ends up being inaccurate anyway, so long as you have a decent way to measure ppfd at ACTUAL canopy level, and you are providing the correct spectrum of light, there is no need for senseless bantering about superior lighting. It’s all superior if it’s fit for your particular grow set up, don’t ridicule people based on your assumptions of their missteps. Why not make this new thing called a suggestion instead?
wietefras
Well-Known Member
The thing is when you make a suggestion, or in this case I simply gave some examples in agreement to the statement of the topic starter that COBs offer better solutions, you receive a deluge of insults from certain people who feel insecure about their board purchase.
Heck I'd rather they come up with reasoning/evidence if they don't agree with the thread topic, but posts filled with only swearing and/or an appeal to authority is what screws these threads up.
So the new thing then is to make no suggestions at all in fear of someone trying to find an insult?
In hindsight perhaps I shouldn't have been so hard on Yodaweed since he actually tried to come up with an example. Albeit that he seems to have cherry picked that example to make COBs look as worse as possible.
But yes I agree on the optics. Lenses might be less worse, but Malocan measured the difference with 90 degree reflectors in a 4'x4' tent and found 15% advantage of bare COBs over reflectors. Both fixture hung at correct heigt and therefore bare were substantially lower.
Or_Gro
Well-Known Member
When you act like a dick, you get treated like one.
I have never attacked dan, i love his price/perfomance approach, and am pissed that the guy (ie dan) with best price/performance in qb fixtures was run out of the biz. Said this and you obviously chose not to read it or you ignored it.
As for your singleminded love for cobs, great, i actually think you have some good points but not balanced perspective. AND, your good points get overwhelmed by your lack of social grace.
Btw, if you post a graphic without corresponding legend/descriptors, expect pushback, particularly when you are acting like a dick!
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Or_Gro
Well-Known Member
Oi douchebag, i don’t.
If you note my response on this topic, it was to correct ghwheels comment, then the other dick started up w his snark.
But what do you care, you’re evidently still pissed about me calling out hlg on their fixture biz.
As is evidently stephen their rep, who won’t respond to my hlg qb 18/35 question.
You wanna have a conversation, learn some fucking courtesy.
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