So upgrading growroom to LED

SSHZ

Well-Known Member
Plan on doing a lot of defoliation and topping, if you want an even canopy- that's the key. I've grown sativa, indica's and everything in between and can get a canopy exactly like the one above each and every time.

When I was running 2000 watts of HPS, I was averaging around 68 oz a crop. Now I'm running 1290 watts, and getting 103 oz on average a crop.
 

SSHZ

Well-Known Member
I won a Medic Grow Fold 8 LED on another site that's sitting boxed up in the garage.......with discounts, it's about $585 delivered. Well worth a consideration if money is an issue or you need a bunch of them. It's a nice LED for the money, for sure.

 

MisterKister

Well-Known Member
I won a Medic Grow Fold 8 LED on another site that's sitting boxed up in the garage.......with discounts, it's about $585 delivered. Well worth a consideration if money is an issue or you need a bunch of them. It's a nice LED for the money, for sure.

I'm planning on purchasing the spectrum x and y here real soon.
 

SSHZ

Well-Known Member
I've had a lot of contact with the company, as they asked me to do a comparison grow between the gavita and their LED.......that may be coming down the line in the future. But I fully inspected the light, had it on, tested the intensity, etc. For the money, it's probably a BEST BUY in the market place right now. There's so many new things on the market, it hard to keep up. Everything keeps getting better though, stronger intensity with lower pricing. In 6 months or a year, there will be a whole new crop of LED's to choose from. Also try to find something with a UV-A or UV-B (or both) option so higher potency.......
 

MisterKister

Well-Known Member
I've had a lot of contact with the company, as they asked me to do a comparison grow between the gavita and their LED.......that may be coming down the line in the future. But I fully inspected the light, had it on, tested the intensity, etc. For the money, it's probably a BEST BUY in the market place right now. There's so many new things on the market, it hard to keep up. Everything keeps getting better though, stronger intensity with lower pricing. In 6 months or a year, there will be a whole new crop of LED's to choose from. Also try to find something with a UV-A or UV-B (or both) option so higher potency.......
Do you know what kind of UV light the spectrum x produces?
 

SSHZ

Well-Known Member
I used to but forget, as it's been a few months now......let me see if I can find my notes.
 
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Dividedsky

Well-Known Member
I've had a lot of contact with the company, as they asked me to do a comparison grow between the gavita and their LED.......that may be coming down the line in the future. But I fully inspected the light, had it on, tested the intensity, etc. For the money, it's probably a BEST BUY in the market place right now. There's so many new things on the market, it hard to keep up. Everything keeps getting better though, stronger intensity with lower pricing. In 6 months or a year, there will be a whole new crop of LED's to choose from. Also try to find something with a UV-A or UV-B (or both) option so higher potency.......
I believe the grower choice roi e-720 will have a uv supplement add on in the near future
 

SSHZ

Well-Known Member
Gavita also makes a nice UV-A bar..........

The big question is do you want UV-A or UV-B? They do different things to plants, with a different lights "on" schedule.

Personally, I use UV-B fixtures by California Lightworks.

Plants respond to exposure to both UVA and UVB light; different plants respond in different ways, but in general studies have shown increased production of antioxidants / flavonoids and other natural sunscreen compounds in a process called photomorphogenesis.
In Cannabis plants, exposure to UVA vs UVB light increases production of THC and CBD. There is some confusion caused by a 1987 study by John Lydon, Alan Teramura and C. Benjamin Coffman titled "UV-B Radiation Effects on Photosynthesis, Growth and Cannabinoid Production of two Cannabis sativa Chemotypes". The study grew Cannabis plants and exposed some to UVB light and others to no UV light at all, finding increased THC concentrations for the plants exposed to UVB compared to the plants not exposed to UV lights for plants at all.
Some people have interpreted this to mean that only UVB light increases the production of THC in Cannabis plants, but this study does not demonstrate that. First, the study was not designed to test exposing Cannabis plants to UVA light- only UVB or no UV at all, so nothing can be concluded from the study about whether UVA affects THC production in Cannabis. Secondly, the study's setup was flawed and really only tested whether exposing Cannabis plants to both UVB and UVA increased THC production compared to no UV light at all, because the cellulose acetate filter they used in an effort to eliminate UVA light from their broad-spectrum UV source was later shown by a different study to allow UVA light to pass through. So the original study only showed that exposure to both UVA and UVB light increased THC production compared to no UV, but not whether UVA or UVB (or the combination) was responsible.
From our own research grows, Black Dog LED has demonstrated that UVA light alone can increase THC and CBD production in Cannabis plants. The combination of UVA and UVB light (from a standard "reptile bulb" fluorescent light) also increases THC and CBD production, but the inclusion of UVB in the light has noticeable detrimental effects on plant growth compared to only UVA.
This is why we've engineered the Black Dog LED Phyto-Genesis Spectrum to only include UVA light, without any UVB wavelengths. The UVA still increases production of secondary metabolites such as THC, CBD, terpenes and flavonoids but without the negative effects of UVB light.
 

Porky1982

Well-Known Member
Hey Porky, I remember you. Yup, banned for the 5th (!) time at the Farm but back on there under an alias until they ban me again. Lol
Ahh fuck that place mate. One drop told me some real nasty shit that the bloke runs the forum ripped him off quite badly. Fucking scum bag of an effort.
I definitely won't be going back there.
 

Porky1982

Well-Known Member
Gavita also makes a nice UV-A bar..........

The big question is do you want UV-A or UV-B? They do different things to plants, with a different lights "on" schedule.

Personally, I use UV-B fixtures by California Lightworks.

Plants respond to exposure to both UVA and UVB light; different plants respond in different ways, but in general studies have shown increased production of antioxidants / flavonoids and other natural sunscreen compounds in a process called photomorphogenesis.
In Cannabis plants, exposure to UVA vs UVB light increases production of THC and CBD. There is some confusion caused by a 1987 study by John Lydon, Alan Teramura and C. Benjamin Coffman titled "UV-B Radiation Effects on Photosynthesis, Growth and Cannabinoid Production of two Cannabis sativa Chemotypes". The study grew Cannabis plants and exposed some to UVB light and others to no UV light at all, finding increased THC concentrations for the plants exposed to UVB compared to the plants not exposed to UV lights for plants at all.
Some people have interpreted this to mean that only UVB light increases the production of THC in Cannabis plants, but this study does not demonstrate that. First, the study was not designed to test exposing Cannabis plants to UVA light- only UVB or no UV at all, so nothing can be concluded from the study about whether UVA affects THC production in Cannabis. Secondly, the study's setup was flawed and really only tested whether exposing Cannabis plants to both UVB and UVA increased THC production compared to no UV light at all, because the cellulose acetate filter they used in an effort to eliminate UVA light from their broad-spectrum UV source was later shown by a different study to allow UVA light to pass through. So the original study only showed that exposure to both UVA and UVB light increased THC production compared to no UV, but not whether UVA or UVB (or the combination) was responsible.
From our own research grows, Black Dog LED has demonstrated that UVA light alone can increase THC and CBD production in Cannabis plants. The combination of UVA and UVB light (from a standard "reptile bulb" fluorescent light) also increases THC and CBD production, but the inclusion of UVB in the light has noticeable detrimental effects on plant growth compared to only UVA.
This is why we've engineered the Black Dog LED Phyto-Genesis Spectrum to only include UVA light, without any UVB wavelengths. The UVA still increases production of secondary metabolites such as THC, CBD, terpenes and flavonoids but without the negative effects of UVB light.
You got a thread going on here ATM mate??
 

Porky1982

Well-Known Member
Also, regarding hanging distance and ppfd.......... I see one way company's manipulate their grid numbers is by adjusting the hanging distance. Lower the distance, more intense the photon stream is. Only issue is though, too close and the plants react poorly. I find in veg, I can't get closer than 26 or so inches or the plants start to show strange results in the leaves. In flowering, I can get closer, maybe 18-20 inches. So company's that show a 14 inch hanging height might show good grid numbers but your plants will look like shit.

So, make sure everything is apples to apples, not apples to oranges, when comparing LED's.
Yeah I keep my lights up as high as possible at all times or I find LED keeps them very squat.
My light hight never changes I just use one light for seedlings then 2 for veg then 3 for flower.65-9e52b0c88091e23b192a7bc562b2e001.jpg
 

SSHZ

Well-Known Member
I am currently running my current grow thread over at cocoforcannabis but I’ll do my next one back here in late August.......... I tend to move around site to site.
 

Dividedsky

Well-Known Member
My buddy who owns the local hydro store switched our all his fluence spydr for the growers choice roi e-720, says he's liking em so far.

Thing is I really had my sights set on the gavitas, was going to get at growershouse last month when they were running a great sale, kinda wish I did pull the trigger because I looking at so many choices now.
signal-2021-07-29-000055.jpg
 
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