PDX Joe
Well-Known Member
Thanks.
Are cobs worth it?
- Thread starter rshackleferd
- Start date
Trippyness
Well-Known Member
BM will always be around. Look at legal atates. Still tons of BM. Price is a huge concern. I just hope Canada does not fuck it up. Everyone should be allowed to grow a certain amount of plants in the rec market
sanjuan
Well-Known Member
When WA state decided to tax rec cannabis at 37% it negated a main objective of the initiative--elimination of the black market. So I still see good sized ops being busted in the news, occasionally.
I've only been to a rec store twice, when they had 25% off and it was still more than what I had been paying for equivalent quality (a couple years ago). The convenience and selection of the store is awesome, though, and I don't deal with people involved in things and substances I have no interest in.
So to answer the thread title, yes COBs are worth it.
I've only been to a rec store twice, when they had 25% off and it was still more than what I had been paying for equivalent quality (a couple years ago). The convenience and selection of the store is awesome, though, and I don't deal with people involved in things and substances I have no interest in.
So to answer the thread title, yes COBs are worth it.
GroErr
Well-Known Member
One of the main (stated) goals of the government in Canada is to price the BM market out so it'll be interesting to see how it's structured (I think they'll get too greedy at all levels of government and f*ck it up). If they actually do that and don't get greedy, combined with large scale/volume producers, it would at minimum reduce the BM. I don't expect the BM to totally go away, there will always be opportunities, as in any market The gravy market like $3000-$4000 lbs. though has a short lifespan imo and hasn't been near that price range up here for many years. That's just my view. I went through many years when I literally couldn't grow enough to meet demand and was getting premium prices for outdoor. Now even before legalization you're lucky to get $1500 and more like $1200 for outdoor up here (I got out when prices dropped below $2400). While you can still make a buck, it's nothing like it was even 10 years ago. It will be interesting to see what happens in the next 5 years, only guarantee is change is coming and not necessarily for the better if you're a little guy looking to make a buck growing. I'm happy with my little gardens now, personal, meds and helping out the odd patient. if I can keep that and be legal I'm good.
All that said, COBs are worth it imo
mauricem00
Well-Known Member
because of heat issues I use T5s with good results but it seems leds are getting cheap http://www.ebay.com/itm/800W-COB-LED-Panel-Grow-Light-System-Full-Spectrum-For-Plant-Replace-HPS-Lamp-/291651237681?hash=item43e7c4b731:g:TMwAAOSwL7VWh0ME.I tried DIY using vero 18s driven at 600ma and saw no improvement over my T5s using the same input power. the LEDs had to be place higher above the plants to get good light spread which is a disadvantage when height is limited in your grow space.HIDs would be a great option if you can manage the heat but for a small closet grow T5s work very well. I have found no advantage to LEDs
Hybridway
Well-Known Member
That's big I think.
JungleTime
Well-Known Member
From what I've heard its upwards of 5%-10%. But I think it does make some sense. Higher potency strains are generally found where air is thinner, such as way above sea level in the mountains. (like afgan kush which is known to be a 30% strain) Because of the thinner air the sun has more uvb/uva penetrate the atmosphere leading the bud to be sun burnt or cope with the extra uvb/uva. How I've been told is that the plant produces more thc to act like a sun block. But this is all hear say and shit I pieced together through some googling lmfao.
But cobs are good enough from my opinion. No reason cobs cant grow 30% without any other supplemented light. Gets down to genetics and how you grow it.
Hybridway
Well-Known Member
Is SFV OG a low yielder? I have 3 in veg now for the first time & cannot afford low yielding strains. Although I've heard of others being low-yielding like the Tangi but it gave me 14 oz. what's your opinion of SFV OG? Thanks!
Hybridway
Well-Known Member
Sounds like you've never grown w/ HPS. Theories almost sound like they make sense though. Almost. Unless you've actually used HPS.
JungleTime
Well-Known Member
I have no idea what you mean by it sounds like I've never grown with hps. Can you explain it?
Greengenes707
Well-Known Member
Link for guod's post...
http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/XLamp-Reference-Designs/HorticultureReferenceDesign.pdf?la=en
From a quick read through, it's very solid and info packed for anyone to dissect. I talked with one of their reps at lightfair and he referenced this, but tried to downplay it. Now I see they were putting a good amount into it.
http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/XLamp-Reference-Designs/HorticultureReferenceDesign.pdf?la=en
From a quick read through, it's very solid and info packed for anyone to dissect. I talked with one of their reps at lightfair and he referenced this, but tried to downplay it. Now I see they were putting a good amount into it.
Hybridway
Well-Known Member
What UV blocking glass? The ones on your head to protect your eyes?
The glass on a hood filters a little but is not designed to. Where do you guys read this stuff? I've read more about LEDs not having uv to protect your eyes. Also the uv burns the diodes with current tech. Ask Mars n Platinum. That's why Bulbs are used instead.
JungleTime
Well-Known Member
All glass blocks uv rays even if its a miniscule precent such as 1%-10%, it filters the light as it has to go through it. Glass is made out of silicon dioxide which is known to block uvb but allows uva to shine through. Ever wonder why people who want the best quality dont air cool their lights and run open bulbs with a massive ac? Ever wonder why open reflectors like gavita's have the reputation they have?
its true like it or not. why don't you fucking educate yourself before spouting out nonsense.
here is some random information easy to find.
https://www.icmag.com/ic/showthread.php?p=1413034
Quest for UVB, using HID lamps
For those unfamiliar with why anyone would want UVB for growing marijuana, this guy explains it best:
THC, UVB and Me: https://www.youtube.com/watch?v=IPcpt3Be28o
My theory is slightly different, I beleive that UV destroys THC, and that in the same sense that human skin makes melanin in response to UV exposure, the plant will create more THC. Exposure to UV for THC production would be best for flowering, except at the end of flowering to let the plant max out its THC levels.
UVA 400 nm - 320 nm
UVB 320 nm - 290 nm
UVC 290 nm - 100 nm
UV usually refers to to all three, but keep in mind there will be exponentially more UVA than UVB, and more UVB than UVC.
Right now the only light source for UVB that I am aware of, are florescent tube reptile lights. That just plain sucks, accommodating them in a HID setup is troubling, especially in vertical and rotary gardens. I need a superior alternative that is low cost, so I have made this thread to discuss my idea.
The idea:
MH/HPS actually emit a lot of UV, but the outer glass shroud is made to block UV and also help contain an arc-tube explosion or rupture.
I propose removing the glass shroud from a compatible MH/HPS.
Finding a compatiable MH/HPS
We have a bunch of things to look out for.
Open fixture rated:
This means it definitely blocks a lot of UV.
MP Metal Halides:
MP rated ones have thicker quartz tube that reduces UV by 70%, and gives the bulb an open-fixture rating.
Self-Extinguishing:
These lamps are designed to self-extinguish if the outer bulb is broken, obviously these won't work.
The arc-tube seems to use the outer glass shroud to support itself in many designs, with only a few wire supports holding it to the base. I have worries that in a horizontal setup this wouldn't be enough to support it once warmed up.
Concerns
There is nothing safe about my idea, arc-tube explosions are rare, but when they occur, shit blows up. Reducing risks of an arc-tube rupture definitely need to be taken, the less on/off switching and at least 15 mins between re-starts should be standard practice with the shroud or without.
UV will damage your eyes and skin, protect both. Most sun lotion only stops UVA so you don't get sunburn, and UVB/UVC are what really causes skin cancer and dark thick clothing is your only protection from it (sun lotion use actually increases skin cancer rates since people end up spending more time in the sun getting UVB/UVC).
Heat and pressure around the arc-tube will be different, not really aware what ramifications this will have. Dust, oil from fingerprints, moisture, and the like on the arc-tube can't possibly be a good thing. Touching the arc-tube could possibly sear your flesh to it and then explode, killing you.
Limitations
Putting glass between the arc-tube and plants would make removing the glass shroud in the first place pointless. Unless you can get a cool tube for example that is made from glass that doesn't block most the UV, or better yet maybe a HM/HPS bulb using this glass already exists.
I just wanted to get the ball rolling on this idea, and I hope there is enough merit to it, to venture into attempting it or die trying. Also, if anyone knows alternatives to get UVB speak now!
/Pondering if the future 1000W CMH bulbs will work without their shroud, night!
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Hybridway
Well-Known Member
Because I do & totally disagree with you.
Led is great n all & I have awhile to go till I know as much as I do about HPS. Led Is well known for being a directional light source w/ a high Intensitybin the middle. Unless you have an evenly spread DIY light, HPS no matter the hood almost, will give you a much higher PPFD or spread with higher intensity. That is actually the main reason why so many of the big growers use HPS.
LED pre-made fixtures directionally focus light leaving everything outside of that focus severely lacking, leaving you with the Flarf
Or Larf (glad to see people using that word) or fluffy pop-corn.
Exactly the opposite.
JungleTime
Well-Known Member
There's where I disagree with you, any grower that knows how to research knows that a diy 200w cob bar is the best bang for your buck. If your buying cobs, your essentially buying a diy kit that has been assembled or that is going to be assembled by you. Cobs do spread out the light in a way that better than hps. 2; 1000w Hps will NOT give you the same ppfd average throughout let say a 4x8 table.
Note you have two light sources with hps on a 4x8 table which face straight down. A 1000w of cobs? You have 20 light sources spread evenly throughout the canopy which gives you a better spread.
Hybridway
Well-Known Member
I'm aware, but that is far from uv blocking. The glass is not intended to & barley does. The MH's have allot of UV. You are right, The glass blocks a little but it's far from being UV blocking glass like it's intentional or something. Just the only way to allow for venting.
Lol! You can read all you want. But I doubt you grow at all. Cuz The right MH's put out more UV then any other lights used for growing. Including UV T-5's due to the huge intensity factor.
Man, all you do is read & Google. Sure, there's allot to be said for Data-Sheets but until you actually grow or use a product, all you're really doing is reading & spouting off shit like a robot. Try actually growing something.
Hybridway
Well-Known Member
I agree, on a DIY build spread evenly. But HPS is the well known PPFD monster prior to DIY COB builds.
wow you really are in denial. did you even fucking read it?
Hids are designed to block the most dangerous UVC and UVB rays. its designed that way for human safety.
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