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Ohwolfie

Ohwolfie

Well-Known Member
I appreciate the reply Danielson999 (Say, have you talked to Mr Miagi lately?;-))

You guessed right about the light configuration too. One on each corner, and the fifth in the middle.So, passive is the way to go on the heatsink then?? Hmmm.. That would save me some hassle of mounting fans and so forth. 190 watts is a lot of LED juice to be cranking into a little tent for sure. Should make the buds explode.

Yes, unfortuantely my tent is only 3' high. Do you have any idea what sized heatsink I'd need? Or, what the method is for finding out what heatsink I need. I am sure it's been covered in Growmau5's tutorials but I have a hard time remembering everything. I am a stoner after all. :bigjoint:
 
Danielson999

Danielson999

Well-Known Member
Von Brawn said:
What exactly is a cob system? Does any company sell them already made? I'm not much of a handy man.

Can you recommend any specific products?
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I would go with what other forum members have suggested. Tasty LED has a few in stock like THIS ONE. That's a 3 cob light and might be enough to fill your tent, especially if you added some CFL's or other supplement in flowering.
 
Danielson999

Danielson999

Well-Known Member
Ohwolfie said:
I appreciate the reply Danielson999 (Say, have you talked to Mr Miagi lately?;-))

You guessed right about the light configuration too. One on each corner, and the fifth in the middle.So, passive is the way to go on the heatsink then?? Hmmm.. That would save me some hassle of mounting fans and so forth. 190 watts is a lot of LED juice to be cranking into a little tent for sure. Should make the buds explode.

Yes, unfortuantely my tent is only 3' high. Do you have any idea what sized heatsink I'd need? Or, what the method is for finding out what heatsink I need. I am sure it's been covered in Growmau5's tutorials but I have a hard time remembering everything. I am a stoner after all. :bigjoint:
Click to expand...
You could easily have a passive system and just have a fan near the top of your tent blowing across your light. I know the 5.8" wide heatsink is popular. You could get 2 pieces 5.8"x18" and then either mount the center cob on a cpu cooler or buy another 5.8"x6" piece, even if you need a fan in the center. I'd go over the numbers again in the heatsink thread and find someone willing to do the math for you, other than that, just watch the video again and he explains the math for you...just use your numbers instead of his.
 
GrumpyToker

GrumpyToker

Well-Known Member
Looking for a hand.

Have a 600 watt HPS used for flower only covering a 3'x3' area. Looking to switch to a LED set up to save money on electricity and heat for the coming summer months. I've done DIY LEDs before on a retrofit to a saltwater reef tank so I've got some idea how to set it up.

Help fill my shopping cart, what should/do I need to get? I'd prefer Cree and again looking to save money on electricity and cut heat.

Thanks for helping
 
Fastslappy

Fastslappy

Well-Known Member
GrumpyToker said:
Looking for a hand.

Have a 600 watt HPS used for flower only covering a 3'x3' area. Looking to switch to a LED set up to save money on electricity and heat for the coming summer months. I've done DIY LEDs before on a retrofit to a saltwater reef tank so I've got some idea how to set it up.

Help fill my shopping cart, what should/do I need to get? I'd prefer Cree and again looking to save money on electricity and cut heat.

Thanks for helping
Click to expand...
here Supra's breakdown for the best set-ups on the 3590

Here are some units you could scale up to fit your space. To some extent, you can adjust the coverage by adjusting the distance to canopy.

@45.7%
(2) CXB3590 3500K CD 36V @ 2.5A (91.65W ea) $95
(2) HLN-80H-36A $90
183 dissipation W -> 99.37W heat
(2) Arctic 64 Plus CPU coolers $26
(2) lenses $8
83.63 PAR W covering 5 ft² = 749 PPFD
$219 = 2.62/PAR W

@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
or
active cooled heatsink 3040 cm² min -> 3.5" X 30" heatsink (for spread) $40 + 80mm fan+psu $10
or
(2) Arctic 64 Plus CPU coolers $26
(2) lenses $8
75 PAR W covering 4ft² = 840 PPFD
75 PAR W covering 5ft² = 672 PPFD
$243 = $3.24/PAR W passive cooled
$218 = $2.91/PAR W active cooled on bar heatsink
$194 = $2.59/PAR W active cooled on CPU coolers (uniform spread, best value?)

@ 56.3%
(4) CXB3590 3500K CD 36V @ 1.4A (49W ea) $190
(1) HLG-185H-C1400 $65
196 dissipation W -> 85.7W heat ->
passive cooled heatsink 10284cm² -> 5.88" X 38" heatsink $72 (could split in 2 to improve uniformity/spread)
or
active cooled heatsink 3428cm² min -> 3.5"X36" heatsink (for spread) $45 +80mm fan +psu $10
(4) lenses $16
110.3 PAR W covering 6ft² = 824 PPFD
$311 = $3.07/PAR W passive cooled (great value point IMO, very efficient use of driver)
$326 = 2.96/PAR W active cooled

@61.2%
(5) CXB3590 3500K CD 36V @ 1.05A (35.5W ea) $237.50
(1) HLG-185H-C1050 $65
177.5 dissipation W -> 68.9W heat ->
passive cooled heatsink 8268cm² -> 4.9"X36" $70
or
active cooled heatsink 2756cm² -> 3.5"X36" heatsink (for spread) $45 + 80mm fan + psu $10
(5) lenses $20
108.63 PAR W covering 6ft² =
$392.50 = $3.61/PAR W passive cooled
$377.50 = $3.48/PAR W active cooled

@64%
(8 ) CXB3590 3500K CD @ 700mA (23W ea) $380
(1) HLG-185H-C700 $65
184 dissipation W ->66W heat ->
passive cooled heatsink 7920cm² -> 4.23"X44" $68 (could split these into 2 or 4 units)
or
active cooled heatsink 2640cm² -> 3.5"X36" heatsink (for spread) $45 + 80mm fan + psu $10
active cooled heatsink 2640cm² -> 1.8"X44" heatsink $34 + 80mm fan + psu $10
(8 ) lenses $32
117.8 PAR W covering 6ft² = 879 PPFD
117.8 PAR w covering 7ft² = 754 PPFD
$545 = $4.63/PAR W passive cooled (great option if your area is high electrical cost, Hawaii, NYC, SoCal etc or if your grow is already heat limited and you want to increase yield without running more AC, ducting and fans)
$532 = $4.52/PAR W active cooled 3.5"
$521 = $4.43/PAR W active cooled 1.8"


So in summary, the higher the efficiency goes, the more appealing passive cooling is. Less wires, less moving parts, less points of failure for about the same cost.

Last edited by a moderator: Dec 25, 2015
CXB3590 1500W
[QUOTE/]
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BST

BST

Active Member
Does the vdc increase if I parallel lpc150-2450 to 4 strings (600ma), From 62vdc to 143vdc?
 
giantsfan24

giantsfan24

Well-Known Member
For a 5 cob set up, what size heatsink should I be thinking about buying? I'm thinking each cob should be about 2" from the edges. The center cob I'm not concerning about but the corners...2" from each side or 3"?

I'm looking at the 12" x 16" x 1.3ish" version. My space is 30" x 30".
 
Danielson999

Danielson999

Well-Known Member
giantsfan24 said:
For a 5 cob set up, what size heatsink should I be thinking about buying? I'm thinking each cob should be about 2" from the edges. The center cob I'm not concerning about but the corners...2" from each side or 3"?

I'm looking at the 12" x 16" x 1.3ish" version. My space is 30" x 30".
Click to expand...
You can't measure heatsink size requirements without knowing how much heat you need to dissipate. If you mentioned what wattage you plan to run them at it would make the equation much easier ;)
There are alot of answers to this in the first 20 pages of the Heatsink thread.
 
Isawthelight

Isawthelight

Well-Known Member
BST said:
Does the vdc increase if I parallel lpc150-2450 to 4 strings (600ma), From 62vdc to 143vdc?
Click to expand...
Vdc output of your driver only increases when you put LEDs in series. Parallel single diodes all feel the same VDC since all the + LED and Driver terminals are tied together. All the Paralleled - LED and Driver terminals are tied together.
http://www.ebay.com/itm/100w-grow-chip-High-power-Full-Spectrum-Epileds-For-DIY-Grow-lamp-flower-MJ-grow-/231819662164?hash=item35f9875354:g:yuYAAOSwqYBWnu-d Two of these fleabay cobs would be a good match for your driver. This would be more efficient use of your driver but I know little about these chips and can't personally vouch for their usefulness.
*Product Name: 100Watt LED Grow chip
*Integrated way: 10 in series, 10 in parallel
*Chip size: 45*45mil
*Chip Brand: Epistar chip
*Voltage: 28-36V
*Currency: 3A
*Color: Full spectrum
 
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REALSTYLES

REALSTYLES

Well-Known Member
Isawthelight said:
Vdc output of your driver only increases when you put LEDs in series. Parallel single diodes all feel the same VDC since all the + LED and Driver terminals are tied together. All the Paralleled - LED and Driver terminals are tied together.
http://www.ebay.com/itm/100w-grow-chip-High-power-Full-Spectrum-Epileds-For-DIY-Grow-lamp-flower-MJ-grow-/231819662164?hash=item35f9875354:g:yuYAAOSwqYBWnu-d Two of these fleabay cobs would be a good match for your driver. This would be more efficient use of your driver but I know little about these chips and can't personally vouch for their usefulness.
*Product Name: 100Watt LED Grow chip
*Integrated way: 10 in series, 10 in parallel
*Chip size: 45*45mil
*Chip Brand: Epistar chip
*Voltage: 28-36V
*Currency: 3A
*Color: Full spectrum
Click to expand...
For $7 more you can get Vero 29 from Kingbrite but they are on holiday Chinese New year and I'd stay away from that chip
 
giantsfan24

giantsfan24

Well-Known Member
Danielson999 said:
You can't measure heatsink size requirements without knowing how much heat you need to dissipate. If you mentioned what wattage you plan to run them at it would make the equation much easier ;)
There are alot of answers to this in the first 20 pages of the Heatsink thread.
Click to expand...
my driver of choice is Mean Well HLG-240H-C1400B. I thought I saw somewhere it ran them at 250w but please bear in mind..I'm going off of another members recommendation so I'm not precisely sure what wattage they will be running at. CXB3070 3500 is the cob
 
S

smokertoker

Well-Known Member
Hi all!

I'm looking at upgrading my current system and was simply looking to get a 1000w HID. I know heat will be an issue with that setup and when I visited my local shop they directed me to some LEDs. The two they had on display were the Nextlight 525w and the Kind K5 XL1000. I would like to buy local so at this point if LED will be my future path then my options are: Nextlight 525w, Kind K5 XL1000, or Kind K5 XL750. One of the guys working says he uses the Nextlight and loves it but only has hearsay of the Kind LED but says their reviews are positive. My grow space is about 2.5'x3.5' typically using the Zerokewl method with ~8 plants in the space.

Thank you for your help in my search for enlightenment.
 
G

Grown'toke420

Member
Hello all, newbie grower here. Okay, situation is what led light to buy for me?

Box:21x21x48in


Might get ir reflective material 90%

Options thrown towards me from helpers in the forum (200w COB led,Mars hydro ll 400w, surplus of CFLs,CMH leds...ect.)

Help me get one in a shopping cart and on a plane to my grow box
 
giantsfan24

giantsfan24

Well-Known Member
If running your cob's at full capacity, meaning your driver hold 5 cobs and you're running it full, how warm do the drivers get?? Is it wattage dependent?
 
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