Greengenes707
Well-Known Member
But didn't you just say this earlier...
The best prices are at cutter. Shipping included or not.
IF you are new to LED and want help choosing what to buy, POST HERE!
- Thread starter SnotBoogie
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REALSTYLES
Well-Known Member
Cutter is good but doesn't have the stock Kingbrite does and where was cutter a year ago cutter is only $1.41 cheaper with the discount code lol.
SydneyLedMan
Member
I'm sure you can work out that I'm in Australia so cutter will probably be faster/ easier.
Anyway, back to my original question will 3-4 Vero 18's cover 1x2.5 (half the tent)? If someone can tell me the math (lumens or watts per square foot) I can work it out.
Thx so far
Anyway, back to my original question will 3-4 Vero 18's cover 1x2.5 (half the tent)? If someone can tell me the math (lumens or watts per square foot) I can work it out.
Thx so far
REALSTYLES
Well-Known Member
25-50w per sq ft 50w being optimal also cutter would be better for you anyway
littlejacob
Well-Known Member
Bonjour
And it is better to run 6 vero18 @500 than 3 @1050mA...same electricity but more spread and efficiency at low current...!
But if you need to buy some bigger for bloom...go for cxb3590 3500ºk cd!
CU
SydneyLedMan
Member
I'll check out the numbers
Final question as I can source the cxa2530 same sort of price as the Vero 18's. Are they a better or worse choice in terms of output?
Final question as I can source the cxa2530 same sort of price as the Vero 18's. Are they a better or worse choice in terms of output?
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TJ baba
Well-Known Member
How much wattage does 1 cree cob cxb3590 put out?
littlejacob
Well-Known Member
Better choice of course If you run them low!
Cxa 2530 @500mA 56% efficient the one from kb...P2 bin...I am not sure but it is good cob even@700mA...and better than vero18 for sure!
CU
Rayne
Well-Known Member
The output of any light emitting diode depends on how much power it is allowed to have.
TJ baba
Well-Known Member
And that's why people buy different size drivers? I probably sound dumb but I'm trying to learn as I grow so I have to be more or less impulsive when it comes to making investments. It adds up to useful trial and error in the end though.
littlejacob
Well-Known Member
Bonjour
Cxb3590 36V are 137w cob @3200mA if I remember well...2800mA is the nominal current...most of us used it @1400mA (50w) for efficiency reason (56% which mean 56% light and 44% heat...a 600hps is 34% brand new and decrease at first light! Not cob...!) and some used it @700mA (24w) 61% for even more efficiency...but I saw 1.7 gpw in soil with this!
And at this mA it run cool so they said 50000h at nominal current and we run them half nom current...so maube 100000h (20years grow...lol!)
And you can spread the area like you never was able to do it...same light Intensity everywhere...and a cob at 50w can cover easy 1.5x1.5 and stay effective I can prouve it!
CU
littlejacob
Well-Known Member
Bonjour
Sorry Rayne but you wrote:"1cm = 2.54 in...it is not true! I guess it is 0.394 in for 1 cm!
I don't want some metric user to made a mistake if they watch this...!
It is not against you...I do not speak very well english so sometimes I may look a little bit too direct...
Have a great day ★
Rayne
Well-Known Member
Yes, some people prefer to buy the use lower bin quality light emitting diodes to save some extra funds. If you are savy you can increase the output of the driver before the diodes gets power.
The_Physicist
Member
Hi, so i have a grow space that is 5 feet long and 2 1/2 feet wide with a height of 6 feet 8 inches and what wondering what would be the best light for my situation. Any help would be much appreciated
TJ baba
Well-Known Member
I want top bin quality for sure.
Up to how many cobs can one driver support?
churtmunk
Well-Known Member
Perhaps give these threads a read through.. lots of great information up around here
https://www.rollitup.org/t/heatsinks-for-diy-led-lamps.851907/page-76#post-12212401
https://www.rollitup.org/t/matching-drivers-and-cobs.883866/
https://www.rollitup.org/t/diy-leds-how-to-power-them.801554/page-115#post-12218815
TJ baba
Well-Known Member
@49.7%
(2) CXB3590 3500K CD 72V @ 1.05A (75.5W ea) $95
(1) HLG-185H-C1400 (running at ~1050mA) $65
151 dissipation W -> 76W heat ->
passive cooled heatsink 9120cm² -> (2) 10"X10" heatsink $75
This is probably what I want since it is the lowest initial cost but I don't think it will cover my entire 5x2 footer, is that set up too small
(2) CXB3590 3500K CD 72V @ 1.05A (75.5W ea) $95
(1) HLG-185H-C1400 (running at ~1050mA) $65
151 dissipation W -> 76W heat ->
passive cooled heatsink 9120cm² -> (2) 10"X10" heatsink $75
This is probably what I want since it is the lowest initial cost but I don't think it will cover my entire 5x2 footer, is that set up too small
Greetings
I was gifted a used led setup, 1-CLG-150-36 with 4-Vero 13 run through 4 -700ma LDD drivers
The CLG, Voltage, 31-41 V, Current 2.1-4.2 A
So if I am reading both data sheets right the setup is putting out ~ 11740 lumens
If I ran the Vero’s without the LDD’s
4@1050=15904
6@700=17610
8@500=17704
Suggestions/options, How much area could this setup grow plants properly.
Thanks
I was gifted a used led setup, 1-CLG-150-36 with 4-Vero 13 run through 4 -700ma LDD drivers
The CLG, Voltage, 31-41 V, Current 2.1-4.2 A
So if I am reading both data sheets right the setup is putting out ~ 11740 lumens
If I ran the Vero’s without the LDD’s
4@1050=15904
6@700=17610
8@500=17704
Suggestions/options, How much area could this setup grow plants properly.
Thanks
Juan Bond
New Member
Hello,
Am I correct that a 25" long piece of the 5.886" heatsink would be able to passively cool two cxb3070s (BB)? Based on Supra's cob spreadsheet and if my math is correct, 2,698.44 cm2 (49.23%×49.83 watts=24.531 heat watts×110 cm2=2,698.44 cm2) of heatsink is required to passively cool one cob. 2,698.44 cm2 × 2 = 5,396.88 cm2 for two cobs. 5,396.88÷260.01 (1" of 5.886" heatsink)= 20.756" long piece of the 5.886" heatsink.
I have a total of 8 cxb3070s (BB) to be driven by 2 hlg-185h-1400b drivers. I want to put 2 cobs on each heatsink to distribute the weight and have flexibility with coverage in my 4x4 tent (plants will only occupy a 3x3 space max). Thanks in advance!
Am I correct that a 25" long piece of the 5.886" heatsink would be able to passively cool two cxb3070s (BB)? Based on Supra's cob spreadsheet and if my math is correct, 2,698.44 cm2 (49.23%×49.83 watts=24.531 heat watts×110 cm2=2,698.44 cm2) of heatsink is required to passively cool one cob. 2,698.44 cm2 × 2 = 5,396.88 cm2 for two cobs. 5,396.88÷260.01 (1" of 5.886" heatsink)= 20.756" long piece of the 5.886" heatsink.
I have a total of 8 cxb3070s (BB) to be driven by 2 hlg-185h-1400b drivers. I want to put 2 cobs on each heatsink to distribute the weight and have flexibility with coverage in my 4x4 tent (plants will only occupy a 3x3 space max). Thanks in advance!
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