Would this be enough for a 3'x3'x72"

Senior Smoke

Senior Smoke

Well-Known Member
B

Buyfrommycity

Well-Known Member
Senior Smoke said:
Other size options: 400 W ($220)

CrxSunny 1200W COB LED Grow Light Full Specturm for for Hydropnic Indoor Plants and Greenhouse Growing Veg and Flower
from Amazon.com - Seller
Help plants generating stems and leaves. 520nm-610nm(Green): Low pigment absorption rate, but great for special plants, cannabis. 610nm-730nm(Red): Low absorption of ...Amazon.com - Seller
$188.76
eBay - paulsaccount5
$183.37
eBay
$190.00
eBay - *lightningdeals*
Compare prices from 5+ stores
Click to expand...
According to the seller it covers 2.5 ftx2.5 ft for flower @24 inches height. Might be able to get away with it for veg. And sellers generally over exagerate the foot print in my experience. Looks pretty cheapo to me. But to each their own! I noticed they are only $160 on crxsunny.com I didn't really look into the shipping aspects tho
 
Last edited:
coreywebster

coreywebster

Well-Known Member
Unfortunately since COBs became so popular every Chinese manufacturer have jumped on the band wagon.
You really want to be looking at something that uses Vero, cree, citizen cobs that are a white light rather than multi coloured.
Most of the sellers on here sell quality lights, lots of them are DIY or kit form.
Timber grow lights
TastyLed
Pacific lighting concepts (more commercial set up)
Cutter.au (for solskin)
Horticultural lighting group (for Quantum boards and cobs)
Cobkits for DIY parts

I like this for a 3x3. http://timbergrowlights.com/300-watt-citizen-clu048-3x3-framework/

You also have the option of using a 315CMH which is also very efficient and has a great spectrum compared to other HID lights.
 
Senior Smoke

Senior Smoke

Well-Known Member
coreywebster said:
Unfortunately since COBs became so popular every Chinese manufacturer have jumped on the band wagon.
You really want to be looking at something that uses Vero, cree, citizen cobs that are a white light rather than multi coloured.
Most of the sellers on here sell quality lights, lots of them are DIY or kit form.
Timber grow lights
TastyLed
Pacific lighting concepts (more commercial set up)
Cutter.au (for solskin)
Horticultural lighting group (for Quantum boards and cobs)
Cobkits for DIY parts

I like this for a 3x3. http://timbergrowlights.com/300-watt-citizen-clu048-3x3-framework/

You also have the option of using a 315CMH which is also very efficient and has a great spectrum compared to other HID lights.
Click to expand...
Its added to my cart. just gotta save a few bucks
 
Senior Smoke

Senior Smoke

Well-Known Member
coreywebster said:
Unfortunately since COBs became so popular every Chinese manufacturer have jumped on the band wagon.
You really want to be looking at something that uses Vero, cree, citizen cobs that are a white light rather than multi coloured.
Most of the sellers on here sell quality lights, lots of them are DIY or kit form.
Timber grow lights
TastyLed
Pacific lighting concepts (more commercial set up)
Cutter.au (for solskin)
Horticultural lighting group (for Quantum boards and cobs)
Cobkits for DIY parts

I like this for a 3x3. http://timbergrowlights.com/300-watt-citizen-clu048-3x3-framework/

You also have the option of using a 315CMH which is also very efficient and has a great spectrum compared to other HID lights.[/QU
Does this light look crazy purple like the Led light that i own does? I hate that purple shit. I like how cfl's dont fuck with my eyes... Well unless i stare right into them. anyways how is this Timbergrow light your recommending? Any weird pink and purple?
Click to expand...
 
coreywebster

coreywebster

Well-Known Member
The light you linked up top does look like a blurple.
The timber kits are white light so no blurple. All the proper cob lights are white light. Its not hard on the eyes but I wouldn't recommend staring at them directly. Very powerful. I will post a pic later when mine turns on so you can see how plants look under them. Mine is a very basic build nothing fancy, does the job though. :bigjoint:
 
greg nr

greg nr

Well-Known Member
I'm using 2 quantum boards (288's) in a 3x3x6.5 tent and it's plenty of light. built it from parts with a hlg 320-2800c driver so I can push the boards to 160+ watts each if I want (I don't), but you can buy one of their 260 watt kits and get everything you need.

Can't tell from that description, but those don't look like cobs. They look like a few discreet diodes in a square carrier. Not the same thing.
 
Senior Smoke

Senior Smoke

Well-Known Member
coreywebster said:
The light you linked up top does look like a blurple.
The timber kits are white light so no blurple. All the proper cob lights are white light. Its not hard on the eyes but I wouldn't recommend staring at them directly. Very powerful. I will post a pic later when mine turns on so you can see how plants look under them. Mine is a very basic build nothing fancy, does the job though. :bigjoint:
Click to expand...
Cool! much appreciated. I'm excited to see your light set-up
 
coreywebster

coreywebster

Well-Known Member
Senior Smoke said:
Cool! much appreciated. I'm excited to see your light set-up
Click to expand...
Its nothing fancy but it works a treat.
I went full DIY, simple style, soldered instead of nice clean cob holders, no reflectors or lenses. It looks messy. The Kits are a lot cleaner and tidier. As you can see my wiring isn't very tidy and I opted to earth each heat sink, not normally necessary.
660w of citizen 1825 90cri 3500k with oversized heat sinks in case I decide to upgrade the drivers. This covers 4x4 which is half of my flower tent. (the fan is not part of the light and anything hanging down is plant support)
Under it is 4 incredible bulk 24 days since they went 12/12. last run was approx. 1.5 lb of dried and cured dank. I'm hoping for 1.45 lb this run. :bigjoint:

IMG_0165.JPG IMG_0166.JPG
 
Senior Smoke

Senior Smoke

Well-Known Member
coreywebster said:
Unfortunately since COBs became so popular every Chinese manufacturer have jumped on the band wagon.
You really want to be looking at something that uses Vero, cree, citizen cobs that are a white light rather than multi coloured.
Most of the sellers on here sell quality lights, lots of them are DIY or kit form.
Timber grow lights
TastyLed
Pacific lighting concepts (more commercial set up)
Cutter.au (for solskin)
Horticultural lighting group (for Quantum boards and cobs)
Cobkits for DIY parts

I like this for a 3x3. http://timbergrowlights.com/300-watt-citizen-clu048-3x3-framework/

You also have the option of using a 315CMH which is also very efficient and has a great spectrum compared to other HID lights.
Click to expand...
I noticed this light comes in 2 colors.. 3000 and 3500. Dont you need 2700k? I guess 3000 isn't far off but 3500 seems a little in the middle. Your thoughts....
 
Senior Smoke

Senior Smoke

Well-Known Member
coreywebster said:
Its nothing fancy but it works a treat.
I went full DIY, simple style, soldered instead of nice clean cob holders, no reflectors or lenses. It looks messy. The Kits are a lot cleaner and tidier. As you can see my wiring isn't very tidy and I opted to earth each heat sink, not normally necessary.
660w of citizen 1825 90cri 3500k with oversized heat sinks in case I decide to upgrade the drivers. This covers 4x4 which is half of my flower tent. (the fan is not part of the light and anything hanging down is plant support)
Under it is 4 incredible bulk 24 days since they went 12/12. last run was approx. 1.5 lb of dried and cured dank. I'm hoping for 1.45 lb this run. :bigjoint:

View attachment 3991920 View attachment 3991921
Click to expand...
Very nice and clean. Plants look happy!
 
coreywebster

coreywebster

Well-Known Member
Senior Smoke said:
I noticed this light comes in 2 colors.. 3000 and 3500. Dont you need 2700k? I guess 3000 isn't far off but 3500 seems a little in the middle. Your thoughts....
Click to expand...
Its a very different spectrum than what we know of usual kelvin ratings like used on CFL. 3500k is the most common all round for both veg and flower, its really about getting as much of all the colours as possible. My Quantum boards are in 3000k and there is a bit of a difference.

CFL 2700k

HPS


Citizen various spectrums at 80cri


Its still not known which is best because there are going to be slight differences but all of them have good overall spectrum.
Truth is we can theorize but there is so much we don't know about how plants use light and what parts of the spectrum do what.
Above is the supposed chart for what plants need, although like all things in science I'm sure theres much more to it than that.
https://fullspectrumleds.com/p/led-spectrum-analysis
 
Senior Smoke

Senior Smoke

Well-Known Member
That sheds a little light on the subject. lol. Im assuming you can replace the bulbs and they must sell different color bulbs for replacements. So much to learn!
 
Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
with QBs, you can do replacements, but you have to be comfortable soldering, as they're surface mount leds. you have to use a rework gun to get the old one off, then solder the new one on.
as far as the color differences go, you can grow a plant under the same K light the whole way, you just won't get very much stretch when you flip to flower. the bigger the difference between the light you veg under, and the light you flower under, the more stretch you'll get. so veg under a 3500 and flower under a 3500, very little stretch, veg under a 2700 and flower under a 5000, get pretty much as much stretch as possible
 
coreywebster

coreywebster

Well-Known Member
Senior Smoke said:
That sheds a little light on the subject. lol. Im assuming you can replace the bulbs and they must sell different color bulbs for replacements. So much to learn!
Click to expand...
Well its unlikely you would need to replace a cob, should last a decade or two. But if you did its not that hard. With a kit you would have a holder which would be solderless so you would unscrew it and use a razor between the heat sink and cob and clean it up and replace with the same voltage cob. A cob is lots of tiny tiny diodes in series and parallel all on on chip. With mine been soldered I would probably just cut the wire, slice under the cob and use a connector and some new thermal adhesive to reattach a new one.
A kit like the timber one you would take it out of the tent and do it in a comfortable place. Mines very heavy due to the oversized heatsinks so I would do it where it hangs. I would hate to have to do it. :bigjoint:
 
Senior Smoke

Senior Smoke

Well-Known Member
Roger A. Shrubber said:
with QBs, you can do replacements, but you have to be comfortable soldering, as they're surface mount leds. you have to use a rework gun to get the old one off, then solder the new one on.
as far as the color differences go, you can grow a plant under the same K light the whole way, you just won't get very much stretch when you flip to flower. the bigger the difference between the light you veg under, and the light you flower under, the more stretch you'll get. so veg under a 3500 and flower under a 3500, very little stretch, veg under a 2700 and flower under a 5000, get pretty much as much stretch as possible
Click to expand...
Thank you! Thats good information. It definetly will factor in on my decision. sounds like cob is the new cool. I will hop the fence and buy a cob, im just trying to learn a little bit about them first.
 
Senior Smoke

Senior Smoke

Well-Known Member
coreywebster said:
Well its unlikely you would need to replace a cob, should last a decade or two. But if you did its not that hard. With a kit you would have a holder which would be solderless so you would unscrew it and use a razor between the heat sink and cob and clean it up and replace with the same voltage cob. A cob is lots of tiny tiny diodes in series and parallel all on on chip. With mine been soldered I would probably just cut the wire, slice under the cob and use a connector and some new thermal adhesive to reattach a new one.
A kit like the timber one you would take it out of the tent and do it in a comfortable place. Mines very heavy due to the oversized heatsinks so I would do it where it hangs. I would hate to have to do it. :bigjoint:
Click to expand...
That sounds complicated for a guy who yesterday never heard of cob lights. Lol. I think Im going to go with the light u recommended. would u pick 3500 or 3000. You own 3000 now right?
 
TacoMac

TacoMac

Well-Known Member
Senior Smoke said:
Other size options: 400 W ($220)

CrxSunny 1200W COB LED Grow Light Full Specturm for for Hydropnic Indoor Plants and Greenhouse Growing Veg and Flower
from Amazon.com - Seller
Help plants generating stems and leaves. 520nm-610nm(Green): Low pigment absorption rate, but great for special plants, cannabis. 610nm-730nm(Red): Low absorption of ...Amazon.com - Seller
$188.76
eBay - paulsaccount5
$183.37
eBay
$190.00
eBay - *lightningdeals*
Compare prices from 5+ stores
Click to expand...
If it sounds too good to be true, it is. A decent 250 watt cob will run you somewhere around 300 dollars. This one "says" it's 1200 watts. It's not. It's not even close.

Scroll down the page and you'll see it's power draw is actually only 250-270 watts.

What these el-cheapo's do is use the max rating on the actual lights and circuits at certain frequencies and add them all together and call it a 1200 watt fixure. The reality though is that they're very cheap lights with very poor elements and very cheap, third rate circuitry.

It's like a cheap guitar amplifier for 300 bucks that says it's 200 watts of power, and then you come over to my place and my Vox AC 30 (which is only 30 watts) blows you out of the room. But, that's why it cost just over $1000 dollars.

Read the fine print. When the power draw on a fixture is only a fraction of what it's advertised to be, don't walk away...RUN. Like hell.
 
dagwood45431

dagwood45431

Well-Known Member
Roger A. Shrubber said:
as far as the color differences go, you can grow a plant under the same K light the whole way, you just won't get very much stretch when you flip to flower. the bigger the difference between the light you veg under, and the light you flower under, the more stretch you'll get. so veg under a 3500 and flower under a 3500, very little stretch, veg under a 2700 and flower under a 5000, get pretty much as much stretch as possible
Click to expand...
That was explained in terms even I can understand. Very well put and thank you!
 
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