1k or 2 400 watts?

wonder6977

wonder6977

Well-Known Member
so i have an 8x8x7 grow tent and was using 1k watt hps. I was only able to fit 3 plants under it because of the height restrictions i was facing. i wanted to get some opinions on putting 2 400 watt hps under raptor hoods to cover more area to fit more plants in. suggestions, comments are all welcome.
 
Flagg420

Flagg420

Well-Known Member
Pair of 600's is what I would do, if your not going full on 2k

8x8 is huge... I could rock 4 600's in there.... (I could rock 4k, but my wife would shit a kitten, and shitty kittens are just.... bad)
 
visajoe1

visajoe1

Well-Known Member
I would go cob all day. Less heat, more efficient, customize your spectrum, reflector angles, and dimmable like hps/mh
 
mo841

mo841

Well-Known Member
I use 2 600's in my 4x4. I would go with two 1000's in that space or 4 600's. If you can afford it get a bunch of cob led's
 
visajoe1

visajoe1

Well-Known Member
Comparisons for 16 vs 20 citi clu048 3000k 1818's below for a 4x8, or similar @2Ton. You could do half of this @mo841

1818 3000K80Min 16 COBS @1400 mA ON 5.88 PROFILE HEATSINK
32 SQ.FT. CANOPY 94% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 1212.94
Cobs power watts: 1140.16
Total voltage forward: 814.40
Total lumens: 160423.06
Total PAR watts assuming 10% loss: 440.19
Total PPF: 2377.00
PPFD based on canopy area: 799.56
PAR watts per sq.ft.: 13.76
Cob efficiency: 42.90%
Power watts per sq.ft.: 35.63
Voltage forward per cob: 50.90
Lumens per watt: 140.70
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: 649.89
umol/s/W: 2.08 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 300 inches
Heatsink length active cooling @40cm^2/heatwatt: 100 inches
COB cost dollar per PAR watt: $0.84
Electric cost @12/12 in 30 days: $56.77
Electric cost @18/6 in 30 days: $85.15
Cost per cob: $23.0
Heatsink cost per inch cut: $1.74
Total cobs cost: $368.0
Total heatsink passive cooling cost: $522.00
Total heatsink active cooling cost: $174.00


1818 3000K80Min 20 COBS @1400 mA ON 5.88 PROFILE HEATSINK
32 SQ.FT. CANOPY 94% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 1516.17
Cobs power watts: 1425.20
Total voltage forward: 1018.00
Total lumens: 200528.83
Total PAR watts assuming 10% loss: 550.23
Total PPF: 2971.25
PPFD based on canopy area: 999.45
PAR watts per sq.ft.: 17.19
Cob efficiency: 42.90%
Power watts per sq.ft.: 44.54
Voltage forward per cob: 50.90
Lumens per watt: 140.70
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: 812.36
umol/s/W: 2.08 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 375 inches
Heatsink length active cooling @40cm^2/heatwatt: 125 inches
COB cost dollar per PAR watt: $0.84
Electric cost @12/12 in 30 days: $70.96
Electric cost @18/6 in 30 days: $106.44
Cost per cob: $23.0
Heatsink cost per inch cut: $1.74
Total cobs cost: $460.0
Total heatsink passive cooling cost: $652.50
Total heatsink active cooling cost: $217.50
 
2Ton

2Ton

Well-Known Member
visajoe1 said:
Comparisons for 16 vs 20 citi clu048 3000k 1818's below for a 4x8, or similar @2Ton. You could do half of this @mo841

1818 3000K80Min 16 COBS @1400 mA ON 5.88 PROFILE HEATSINK
32 SQ.FT. CANOPY 94% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 1212.94
Cobs power watts: 1140.16
Total voltage forward: 814.40
Total lumens: 160423.06
Total PAR watts assuming 10% loss: 440.19
Total PPF: 2377.00
PPFD based on canopy area: 799.56
PAR watts per sq.ft.: 13.76
Cob efficiency: 42.90%
Power watts per sq.ft.: 35.63
Voltage forward per cob: 50.90
Lumens per watt: 140.70
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: 649.89
umol/s/W: 2.08 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 300 inches
Heatsink length active cooling @40cm^2/heatwatt: 100 inches
COB cost dollar per PAR watt: $0.84
Electric cost @12/12 in 30 days: $56.77
Electric cost @18/6 in 30 days: $85.15
Cost per cob: $23.0
Heatsink cost per inch cut: $1.74
Total cobs cost: $368.0
Total heatsink passive cooling cost: $522.00
Total heatsink active cooling cost: $174.00


1818 3000K80Min 20 COBS @1400 mA ON 5.88 PROFILE HEATSINK
32 SQ.FT. CANOPY 94% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 1516.17
Cobs power watts: 1425.20
Total voltage forward: 1018.00
Total lumens: 200528.83
Total PAR watts assuming 10% loss: 550.23
Total PPF: 2971.25
PPFD based on canopy area: 999.45
PAR watts per sq.ft.: 17.19
Cob efficiency: 42.90%
Power watts per sq.ft.: 44.54
Voltage forward per cob: 50.90
Lumens per watt: 140.70
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: 812.36
umol/s/W: 2.08 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 375 inches
Heatsink length active cooling @40cm^2/heatwatt: 125 inches
COB cost dollar per PAR watt: $0.84
Electric cost @12/12 in 30 days: $70.96
Electric cost @18/6 in 30 days: $106.44
Cost per cob: $23.0
Heatsink cost per inch cut: $1.74
Total cobs cost: $460.0
Total heatsink passive cooling cost: $652.50
Total heatsink active cooling cost: $217.50
Click to expand...
I use 2 x 600 hps and one 600 Mh for quality of produce and yeild :) thats why i use 3 x 600 in thag space
 
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