canadian1969
Well-Known Member
thank you!!!!!!!! OMG
would it be possible
- Thread starter clouds
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Victor6634
Well-Known Member
How do you know they are genuine? Most of what they been selling are the Bs why would I want Bs when I can get Cs from HLG or Cobkits
Randomblame
Well-Known Member
Because @VegasWinner has showed some close shots of the diodes on his boards and it was at least LM561c.
No clue if its realy S6 bin or not but it was LM561c. Only the seller knows which bin was truly used.
I would anyway not use them because the F-strips give me much more flexibillity and I don't like the board layout(half side 3500°k, other half 5000°k).
Victor6634
Well-Known Member
Quantum Boards all the way for me at least you know what your getting
clouds
Well-Known Member
im so confused on the kits what kit would work for a 4x4 they all say they are the CXB3590 im new to this whole led system build it yourself thing
is there any kit i can just add to piece of aluminum and use that as a heatsink and frame
http://timbergrowlights.com/grow-light-kits/
is there any kit i can just add to piece of aluminum and use that as a heatsink and frame
http://timbergrowlights.com/grow-light-kits/
coreywebster
Well-Known Member
CXBs are expensive in comparison. Veros are a bit more cost effective I believe.
Any COB will need a proper heatsink as pictured in your link. There are strips and boards which you can use with just a sheet of aluminium.
Those kits in your link are all different, some are cree 3590s some are vero and some are citizen, the cree will always be a bit more expensive. The 400w vero kit is a reasonable light for a 4x4 although I like more wattage than that.
Any COB will need a proper heatsink as pictured in your link. There are strips and boards which you can use with just a sheet of aluminium.
Those kits in your link are all different, some are cree 3590s some are vero and some are citizen, the cree will always be a bit more expensive. The 400w vero kit is a reasonable light for a 4x4 although I like more wattage than that.
clouds
Well-Known Member
was thinking of building something like growmau5 build but its making me feel stupid trying to find the stuff i need or what to buy so i just started looking at the kits i just want to make a good light lol
coreywebster
Well-Known Member
Well I can sympathise with that. I was the same when I decided to build my own too. It seems so complicated but at some point you will sit back and think to yourself why did I not understand.
Perhaps @Randomblame can suggest a set up for a 4x4 using vero or citizen COBs. Give you an idea of how many cobs and which drivers to go for.
I would also consider contacting kingbrite on Alibaba for some real good prices on everything you would need apart from the aluminium angle for the frame.
Its worth getting his price list at least, may be cheaper to go with cobkits if your in the USA, the delivery and lack of import tax may make him a better deal.
clouds
Well-Known Member
ya that would be cool thats mostly what im trying to understand what cobs with what driver i have the file for the case to be made at a metal shop but its the guts i dont understand one i get that far i can build it watching the video but its getting the parts that im looking at trying to get cheaper then the premade ones
was even looking at getting one of the cheap lighting kits that comes with the drivers and just rebuild it when it stops working
just looking at building a like 500-600w system something i can repair as parts fail or upgrade as time goes on
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Randomblame
Well-Known Member
If you live in the US and want to build a COB based lamp, I highly recommend @CobKits. He has everything you need and his kits are complete. He is very helpful and will advise you well also after the purchase. BTW, failures in the LED area are very rare. If your lamp is running, it will likely do so for the next 10 years or so.
In the meantime, you should take a look at the thread below. Then you know exactly how to wire your lights properly.
I'm a fan of efficient 1 COB per sft solutions, that would be 16 COB's(CXM22) for a 4x 4' tent and 2 drivers(HLG-240H-48A) for around 520-560w at the wall.
https://www.rollitup.org/t/diy-leds-how-to-power-them.801554/
In the meantime, you should take a look at the thread below. Then you know exactly how to wire your lights properly.
I'm a fan of efficient 1 COB per sft solutions, that would be 16 COB's(CXM22) for a 4x 4' tent and 2 drivers(HLG-240H-48A) for around 520-560w at the wall.
https://www.rollitup.org/t/diy-leds-how-to-power-them.801554/
Two of those would kill it !
swedsteven
Well-Known Member
Could i change those cheap cob for
4 off these she pull 210 watts
Citizen CLU048-1212 90CRI GEN5
https://cobkits.com/product/citizen-clu048-1212-90cri-gen5/
@CobKits
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swedsteven
Well-Known Member
Allready order the cob and holder from cob kit but im not sure if they will work there nothing on the 4 driver that tell me there power .
paraordnance
Well-Known Member
No, this cannot be accomplished for $300-400 CAD for 4x4 tent. Telling you as canuck who built his own COBs (Vero 27 gen3) from parts. You need at a very minimum 480 watts of COBs to achieve 30 watt/sq ft. Usually 40-50 watt/sq. ft is what recommended, so more like 650-800 watts is what required for your area. Even if you get parts from Alibaba just shipping alone will be around $100 USD, because pin fin heatsinks are bulk and heavy. The reason I went active cooling on my cob fixtures
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paraordnance
Well-Known Member
These prices are far away from reality for Canadian consumers. You listing US sites and products, it cost more here. F-series strips $36 for 4' single strip (50 watt) or $65 for double row strips, which are 100 watt (Best value). So you looking at 7-8 double row strips, or approximately $450 just for strips alone! Now HLG-480 cost close to $200 not 140. Aluminum c-channel is around $30/8 ft, and that is all you really need for strip build.
I'll give you a pro hint. Get a Sumsung /Bridgelux strips, don't waste your time on COBs. I have 4 COB fixtures (200 watt) each and I'm moving to strips as COBs at 100 watt each produce a lot of heat and require massive passive heatsink or active cooling.
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swedsteven
Well-Known Member
I want to hack it!
Convert those epistar to citezen. they say that she run best at 50watts or less 200watts ÷4 chip is 50 watts each ? That mean will be a good option ill try with only 1 chip and if it work change the 3 other! Citizen CLU048-1212 90CRI GEN5
Convert those epistar to citezen. they say that she run best at 50watts or less 200watts ÷4 chip is 50 watts each ? That mean will be a good option ill try with only 1 chip and if it work change the 3 other! Citizen CLU048-1212 90CRI GEN5
RainDan
Well-Known Member
Hi @clouds,
Many growers do a hybrid HID/COB setup as you are describing for similar reasons. The dimmer helps to control the blending of the output of the two lights and having the COBs individually mountable makes it easier to adjust intensity at canopy given the potential different operating heights.
The heat sinks all come with (4) mounting points on the face of the base plate (with mounting hardware) as well as (2) mounting points on (2) of the opposing sides, making them ideal for affixing to a frame or suspending individually.
Hope this helps.
Thanks,
Dan
Randomblame
Well-Known Member
Huh, thats a huge difference. Maybe you can get the c-channels for cheap at the scrapyard. I got all my heatsinks from a scrapyard at the daily kilo-price base(~3$US). Maybe a way to keep the costs at least a bit lower...