Newb 1200 watt first diy led

Airwalker16

Airwalker16

Well-Known Member
Vonkins said:
I have a 2amp power supply (ac adapter). 80% would be 1.6amps. My fans pull .14amps a piece. 11 fans = 1.6 amps. I only need to run 10. So basically this one power supply should be sufficient enough for all 10 fans. Correct?
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Yes. Like with my diy light, I used 4 140mm fans that each required 0.5a to run. So I got 2 MW apv12-12's that each put out 1amp.
 
Vonkins

Vonkins

Well-Known Member
Are the 6s for screwing down cob holder and 10s for the reflector or vice versa. It appeared on GreenGenes 200w cree build he only had 2 holes drilled and tapped per cob holder
 
MeGaKiLlErMaN

MeGaKiLlErMaN

Well-Known Member
Vonkins said:
Gonna be running 4 cobs with hlg240-1750b
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Whats the area youre running these for? It would be great for a 5x5 thats for sure. Im not sure on DB for 90CRI 3000K... I didnt think those were out. Active cooling would be what I suggest.


CXB3590CD36V3500K 20 COBS @1.75A ON 5.88 PROFILE HEATSINK
25 SQ.FT. CANOPY 92% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 1350.0
Cobs power watts: 1242
Total voltage forward: 710
Total lumens: 203191
Total PAR watts assuming 10% loss: 591
Total PPF: 2748.15
PPFD based on canopy area: 1183.23
PAR watts per sq.ft.: 23.64
Cob efficiency: 52.87%
Power watts per sq.ft.: 49.68
Voltage forward per cob: 35.49
Lumens per watt: 163.6
Heatsink riser thickness / number of fins / fin's length: 0.27in/14/1.0in
Heatsink area per inch: 260.01 cm^2
Total heat watts: 585
umol/s/W / CRI: 4.65 / Estimated
Heatsink length passive cooling @120cm^2/heatwatt: 270 inches
Heatsink length active cooling @40cm^2/heatwatt: 90 inches
COB cost dollar per PAR watt: $1.61
Electric cost @12/12 in 30 days: $63.68
Electric cost @18/6 in 30 days: $95.27
Cost per cob: $47.62
Heatsink cost per inch cut: $1.74
Total cobs cost: $952
Total heatsink passive cooling cost: $470
Total heatsink active cooling cost: $156
 
Vonkins

Vonkins

Well-Known Member
MeGaKiLlErMaN said:
Whats the area youre running these for? It would be great for a 5x5 thats for sure. Im not sure on DB for 90CRI 3000K... I didnt think those were out. Active cooling would be what I suggest.


CXB3590CD36V3500K 20 COBS @1.75A ON 5.88 PROFILE HEATSINK
25 SQ.FT. CANOPY 92% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 1350.0
Cobs power watts: 1242
Total voltage forward: 710
Total lumens: 203191
Total PAR watts assuming 10% loss: 591
Total PPF: 2748.15
PPFD based on canopy area: 1183.23
PAR watts per sq.ft.: 23.64
Cob efficiency: 52.87%
Power watts per sq.ft.: 49.68
Voltage forward per cob: 35.49
Lumens per watt: 163.6
Heatsink riser thickness / number of fins / fin's length: 0.27in/14/1.0in
Heatsink area per inch: 260.01 cm^2
Total heat watts: 585
umol/s/W / CRI: 4.65 / Estimated
Heatsink length passive cooling @120cm^2/heatwatt: 270 inches
Heatsink length active cooling @40cm^2/heatwatt: 90 inches
COB cost dollar per PAR watt: $1.61
Electric cost @12/12 in 30 days: $63.68
Electric cost @18/6 in 30 days: $95.27
Cost per cob: $47.62
Heatsink cost per inch cut: $1.74
Total cobs cost: $952
Total heatsink passive cooling cost: $470
Total heatsink active cooling cost: $156
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I got all that bro. I'm ready to rock. I'm actively cooling each heatsink with 2 140 mm coolmaster fans. I was thinking a 4×8 grow space but I have no problem going smaller. But I know several people running this number of cobs in the same size grow space and killing it. What do u guys think on the size room to put these babies in. I was just about to purchase a 4×8 tent. Let me know yalls thoughts. Cobs are 3000k 36v BD 90cri. And YES!! I did drop a chunk $ on all these supplies. Just wondering how much my first yield might be. We'll soon see. Any guesses for fun?
 
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sixstring2112

sixstring2112

Well-Known Member
Vonkins said:
I got all that bro. I'm ready to rock. I'm actively cooling each heatsink with 2 140 mm coolmaster fans. I was thinking a 4×8 grow space but I have no problem going smaller. But I know several people running this number of cobs in the same size grow space and killing it. What do u guys think on the size room to put these babies in. I was just about to purchase a 4×8 tent. Let me know yalls thoughts. Cobs are 3000k 36v BD 90cri
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sounds like a solid plan and based on the info @MeGaKiLlErMaN posted it looks like you will have more than enough light in there for a 4 x 8 it should kill it
 
T

THE KONASSURE

Well-Known Member
you using all 20 from uptop or you going to use 4 to 8 for side lights or at funny angles to get into the canopy better ?

started using our ghetto home made 700w 3 cob side light the other day looking at it may make you feel better about how good your light looks when your done, lol

light 2.jpg
 

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MeGaKiLlErMaN

MeGaKiLlErMaN

Well-Known Member
THE KONASSURE said:
you using all 20 from uptop or you going to use 4 to 8 for side lights or at funny angles to get into the canopy better ?

started using our ghetto home made 700w 3 cob side light the other day looking at it may make you feel better about how good your light looks when your done, lol

View attachment 3791099
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Good idea, but that's wayyy to far away to give a good bit of help... Move it like 2ft away max
 
Vonkins

Vonkins

Well-Known Member
THE KONASSURE said:
you using all 20 from uptop or you going to use 4 to 8 for side lights or at funny angles to get into the canopy better ?

started using our ghetto home made 700w 3 cob side light the other day looking at it may make you feel better about how good your light looks when your done, lol

View attachment 3791099
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All gonna be up top. 5 bars of 4 cobs. Outside bars mounted 12 inches to center from outside walls. Middle bar mounted at 48 inches ( center of grow space). Now I will center the other 2 bars in between the 1st and middle fixture then the second between the 5th and middle fixture. Light should be evenly distributed with this setup
 
T

THE KONASSURE

Well-Known Member
MeGaKiLlErMaN said:
Good idea, but that's wayyy to far away to give a good bit of help... Move it like 2ft away max
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it`s about 800mm or so away from the plants, they already have a lot of light was hoping to squeeze a row of short plants in front of the side light

just testing the temps hit 28c today, see if it stays under 32c tomorrow then next week I might move it closer or put another row of plants in front of it

My analog light meter was off the gauge @1m by 1.5m half way drops off around 2m it`s mostly to fill out the bottom buds and add heat for the winter, plants are a bit small still from losing a batch due to a fan crapping out in the summer so should help dry the pots out faster, lol
 
Tigerpaws

Tigerpaws

Well-Known Member
Just starting to research the COB LEDS and considering building one. I haven't been able to find anywhere what the coverage is for one COB. Can anyone answer this for me or direct me to a chart of some sort. Thanks.
 
MeGaKiLlErMaN

MeGaKiLlErMaN

Well-Known Member
Tigerpaws said:
Just starting to research the COB LEDS and considering building one. I haven't been able to find anywhere what the coverage is for one COB. Can anyone answer this for me or direct me to a chart of some sort. Thanks.
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You don't want just one, the benifits comes from the overlapping light and even distribution. But you can use the LED calculator to find this info.

THE KONASSURE said:
it`s about 800mm or so away from the plants, they already have a lot of light was hoping to squeeze a row of short plants in front of the side light

just testing the temps hit 28c today, see if it stays under 32c tomorrow then next week I might move it closer or put another row of plants in front of it

My analog light meter was off the gauge @1m by 1.5m half way drops off around 2m it`s mostly to fill out the bottom buds and add heat for the winter, plants are a bit small still from losing a batch due to a fan crapping out in the summer so should help dry the pots out faster, lol
Click to expand...
Try running at 86F it's the optimum for photosynthesis. Check my signature.
 
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