ZioFrancolino
Active Member
I'm planning on growing only one autoflowering plant and I'm good with 30-50g per cycle, what do you think?
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2x50W cxb3590 enough for little plant in 60x60x140cm tent?
- Thread starter ZioFrancolino
- Start date
Rocket Soul
Well-Known Member
That sounds perfectly doable. 25w per square foot. Not a lot for 12/12 but should be fine for an auto running 18/6 or similar.
With such little height you may wanna do some plant training to keep them about 30 cm from the light.
With such little height you may wanna do some plant training to keep them about 30 cm from the light.
ZioFrancolino
Active Member
Thanks for your reply. I'm planning on growing autoflowering strains. Do you think for the same amout of money, more or less, 3xclu048 1212 would be better than 2 cree cxb3590(they cost 10 euros more)?
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Rocket Soul
Well-Known Member
Depending on the price cree is not really the best chip anymore. @CobKits has a lot of data on chip comparison.
A lot of people around here would put a quantumboard in that space but you might run out of height on your space. If you want the light more spread out you can go for samsung strips or bridgelux strips.
For your space i would probably steer you towards 2 feet bridgelux eb gen2 strips. They can run without heatsink at nominal power (700mA) which means you only need to get about 100w of strips and a driver.
If youre deadset for cobs: 3 Citi1212 instead of 2 crees would probably give similar reaults in amount of light running 100w. But:
-3 lights source running softer means you have more clearance
-You still have to get heatsink for the 3rd cob, they are heavy and cost shipping.
A lot of people around here would put a quantumboard in that space but you might run out of height on your space. If you want the light more spread out you can go for samsung strips or bridgelux strips.
For your space i would probably steer you towards 2 feet bridgelux eb gen2 strips. They can run without heatsink at nominal power (700mA) which means you only need to get about 100w of strips and a driver.
If youre deadset for cobs: 3 Citi1212 instead of 2 crees would probably give similar reaults in amount of light running 100w. But:
-3 lights source running softer means you have more clearance
-You still have to get heatsink for the 3rd cob, they are heavy and cost shipping.
ZioFrancolino
Active Member
I mean 3 citi1212 driven at 50w each. Anyway I'm doing active cooling, in Europe you can't find passive heatsinks at good price. About QBs I need to do more research...
Rocket Soul
Well-Known Member
If youre in europe i would recommend checking out
https://www.rollitup.org/t/board-from-europe.958506/
Flowerbologna has a board that will work without heatsink for about 80 euro. Samsung diodes in highest bin. Board is 40x28 cm so light is nicely spread out. Got 4 but still need to set them up.
Also some good boards from led-tech.de, similar in price. Next gen samsung chips. A bit smaller so only without heatsink till 80w but might be enough for autos.
One board will do your whole space between 70-100w depending on how long you run them per day. Boards or ledstripa seem to work out the cheapest nowadays: if you run them soft enough you dont need a heatsink most of thhe time, or you can just use a thin sheet of alu. Since the chip is so many times bigger the heat can disipate easier. So you dont have to shipp expensive and heavy heatsinks or loose height from your growspace.
You can find all links and info in the euro board thread above.
https://www.rollitup.org/t/board-from-europe.958506/
Flowerbologna has a board that will work without heatsink for about 80 euro. Samsung diodes in highest bin. Board is 40x28 cm so light is nicely spread out. Got 4 but still need to set them up.
Also some good boards from led-tech.de, similar in price. Next gen samsung chips. A bit smaller so only without heatsink till 80w but might be enough for autos.
One board will do your whole space between 70-100w depending on how long you run them per day. Boards or ledstripa seem to work out the cheapest nowadays: if you run them soft enough you dont need a heatsink most of thhe time, or you can just use a thin sheet of alu. Since the chip is so many times bigger the heat can disipate easier. So you dont have to shipp expensive and heavy heatsinks or loose height from your growspace.
You can find all links and info in the euro board thread above.
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Airwalker16
Well-Known Member
Www.photonfantomdesigns.com/shop/
Cheaper than QBs and you could just buy 2, and an HLG-240H-C2100B and be golden. 3 would be better to fit on driver though,
Cheaper than QBs and you could just buy 2, and an HLG-240H-C2100B and be golden. 3 would be better to fit on driver though,
100w in that space is do'able. One of my tents is the same size as your tent. I have a 4 x cxb3590 diy panel in there. At 2 x 50w you are going to have some hot spots & are going to run out of height pretty quick. I have to scrog my grows in that tent.
Like @Rocket Soul suggested you're best bet is using led strips. Samsung or bridgelux strips or quantum boards. You can get them much closer to you're plants so you need less headroom for them.
Like @Rocket Soul suggested you're best bet is using led strips. Samsung or bridgelux strips or quantum boards. You can get them much closer to you're plants so you need less headroom for them.
gwheels
Well-Known Member
I have a 200 watt vero (2 X 100 watt) with a dimmer. I run it in a 50 x 90 x 150 CM tent. It runs better at around 150 watts for that space and I can run my 4 inch scrubber really low to move the air out. Next round I will try a single 135 watt quantum board. I think 100 watts of cobs can produce 50 to 150 grams of buds depending on strain and skill etc. The 135 will probably be on part with 200 watts of vero. I just got it from growers choice and have yet to run it. Tents are full at the moment 
ZioFrancolino
Active Member
Do those need heatsink right? I live in Europe though, that's sold only in the USA
I'll try to study the quantum boards, I'm new to leds. Are QBs cheaper than cob led?
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Airwalker16
Well-Known Member
They do NOT need heatsinks up to 2100mA
Rocket Soul
Well-Known Member
He wont sell these to europe, las
Quantum boards might not be your best option in europe as you have to import them.
Todogrowleds.com has some quantumboard sets but not loose boards.
These are some similar products from reliable retailers.
https://led-tech.de/en/ZEUS-308-High-Performance-PCB-3000k
http://www.flowerpowerbologna.it/epages/99883.mobile/it_IT/?ObjectPath=/Shops/99883/Products/6000&Locale=it_IT
ZioFrancolino
Active Member
Thank you, I think I'll buy the qb from flowerpowerbologna and drive it with a mw hlg 240h c2100
mahiluana
Well-Known Member
@ZioFrancolino --- You can buy 2/3or4 x 200W / Quad-boards for € 82,-/ 111,-/ or 138,- in Germanyno heatsink needed if P < 60W
https://www.lumen-laden.de/products/quad-board-400-leds-smd5730-200w/
KonopCh
Well-Known Member
Those are crappy SMD5730 diodes and not Samsung LM561C or LM301B. Stay away from those boards.
no heatsink needed if P < 60W
https://www.lumen-laden.de/products/quad-board-400-leds-smd5730-200w/
danke !
Schalalala
Active Member
Junge junge, dreister gehts echt nimmer.
Du hast doch noch nicht mal ein Datenblatt von den verbauten LEDs und versprichst hier 190lm/W - du kleiner dummer Betrüger.
Hättest du nen IQ über 90, würdest du wenigstens "richtige" QB-Clones über ALibaba kaufen, aber ne, noch nicht mal das kriegste hin. Unfassbar wie blöd du bist!
SCAM-ALERT!
Promising 190 lm/W with Aliexpress-Boards.... speechless.
ZioFrancolino
Active Member
@Rocket Soul what driver do you suggest for the Project 342 board? 2100 mA or 1740 mA?
Rocket Soul
Well-Known Member
Id prprobably suggest meanwell hlg120h-54A (assuming the board is 54V, cant quite remember). A-type driver lets you dim to half power using on board dials for about 75w output. But that might ve too much for a small seedling, at least make sure you hang the light high over an immature plant as it could get fried with too much light. B-type driver would work to dim to 10% but would be able to drive the board til 2100ma as its voltage is capped at 54v.
Also, would recommend using a sheet of 2-3mm of alu as heatsink for high wattage operation.
At 2100ma you need the light about 50cm or more for a mature auto, rough calculation.