CITIZEN COB DIY BUILD ADVICE AND NUMBERS

Citizen clu48-1818 or cree cxb-3590 under hlg320h-c1400a?

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berten-ernie420

berten-ernie420

Well-Known Member
So i pulled the trigger fellas. Finally ordered all my parts and am just waiting for them to be delivered to assemble and install. Heres what i got coming..
1) HLG320H-C1400A
2) 4x Citizen CLU048-1818 @3000k 70CRI
3) 4x Mechatronix PinFin 111mm x 80mm x 10mm (base) blk (annodized)
4) 4x Ideal 50-2204CT chip holders
5) 4x Ledil Angelina reflectors model # F13838
6) 4x Ideal 50-2100AN adapter rings

My questions are these
1) what would the ppfd be on a 4 foot light using the previous mentioned parts for both veg dimming down to approx 30% and flower running at full in a 4x2x7 closet
2) what is the wattage per cob
3) would it be wise to put active cooling capabilities on the heatsink if my grow room only reaches 80°f

Let me know what u guys think if my setup sounds right or if im just pissing in the wind here as its my first attempt at a diy led. Or led period for that matter.
 
iHearAll

iHearAll

Well-Known Member
i dont see PAR on the datasheet but at the current supply, the LEDs are at 100% luminous flux and settle a a nice efficient temperature of 25C. The power consumption at 1.4a and roughly 52v will be 62.8watts. 4ct would be 249.6 watts. That's a plenty big enough light to grow. gram/watt you could get a half pound under the panel.
 
berten-ernie420

berten-ernie420

Well-Known Member
iHearAll said:
i dont see PAR on the datasheet but at the current supply, the LEDs are at 100% luminous flux and settle a a nice efficient temperature of 25C. The power consumption at 1.4a and roughly 52v will be 62.8watts. 4ct would be 249.6 watts. That's a plenty big enough light to grow. gram/watt you could get a half pound under the panel.
Click to expand...
I was beginning to think i was all alone on this build. Thanks for the positive words. They cant get here soon enough!
 
iHearAll

iHearAll

Well-Known Member
im in the same boat. i ordered 2 clu058 2700k for early flowering and 2 4000k for late flowering and running each panel of two at 330w. they havent even shipped yet i dont think. bud at cobkits is probably swamped from the holidays
 
berten-ernie420

berten-ernie420

Well-Known Member
I got mine from cdi. But i havent gotten any other email other than the auto sent one. How long does it usually take to hear back from cdi? I ordered on the 1st of jan..no other correspondence other than the auto sent email. N ive tried calling no1 answers.
 
coreywebster

coreywebster

Well-Known Member
FULL POWER

1818 3000K70Min 4 COBS @1400 mA ON 1.813 PROFILE HEATSINK
8 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 329.46
Cobs power watts: 296.52
Total voltage forward: 211.80
Total lumens: 48005.12
Total PAR watts assuming 10% loss: 131.72
Total PPF: 711.30
PPFD based on canopy area: 957.04
PAR watts per sq.ft.: 16.47
Cob efficiency: 49.36%
Power watts per sq.ft.: 37.06
Voltage forward per cob: 52.95
Lumens per watt: 161.90
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 151.22
umol/s/W: 2.40 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 180 inches
Heatsink length active cooling @40cm^2/heatwatt: 60 inches
COB cost dollar per PAR watt: $0.70
Electric cost @12/12 in 30 days: $11.86
Electric cost @18/6 in 30 days: $17.79
Cost per cob: $23.0
Heatsink cost per inch cut: $0.66
Total cobs cost: $92.0
Total heatsink passive cooling cost: $118.80
Total heatsink active cooling cost: $39.60

70% POWER

1818 3000K70Min 4 COBS @980 mA ON 1.813 PROFILE HEATSINK
8 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 224.53
Cobs power watts: 202.08
Total voltage forward: 206.20
Total lumens: 34396.19
Total PAR watts assuming 10% loss: 94.38
Total PPF: 509.65
PPFD based on canopy area: 685.73
PAR watts per sq.ft.: 11.80
Cob efficiency: 51.89%
Power watts per sq.ft.: 25.26
Voltage forward per cob: 51.55
Lumens per watt: 170.21
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 97.00
umol/s/W: 2.52 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 115 inches
Heatsink length active cooling @40cm^2/heatwatt: 38 inches
COB cost dollar per PAR watt: $0.97
Electric cost @12/12 in 30 days: $8.08
Electric cost @18/6 in 30 days: $12.12
Cost per cob: $23.0
Heatsink cost per inch cut: $0.66
Total cobs cost: $92.0
Total heatsink passive cooling cost: $75.90
Total heatsink active cooling cost: $25.08

Your driver will be higher than 90% efficiency so electrical costs and power at the wall will differ:weed:
 
berten-ernie420

berten-ernie420

Well-Known Member
coreywebster said:
FULL POWER

1818 3000K70Min 4 COBS @1400 mA ON 1.813 PROFILE HEATSINK
8 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 329.46
Cobs power watts: 296.52
Total voltage forward: 211.80
Total lumens: 48005.12
Total PAR watts assuming 10% loss: 131.72
Total PPF: 711.30
PPFD based on canopy area: 957.04
PAR watts per sq.ft.: 16.47
Cob efficiency: 49.36%
Power watts per sq.ft.: 37.06
Voltage forward per cob: 52.95
Lumens per watt: 161.90
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 151.22
umol/s/W: 2.40 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 180 inches
Heatsink length active cooling @40cm^2/heatwatt: 60 inches
COB cost dollar per PAR watt: $0.70
Electric cost @12/12 in 30 days: $11.86
Electric cost @18/6 in 30 days: $17.79
Cost per cob: $23.0
Heatsink cost per inch cut: $0.66
Total cobs cost: $92.0
Total heatsink passive cooling cost: $118.80
Total heatsink active cooling cost: $39.60

70% POWER

1818 3000K70Min 4 COBS @980 mA ON 1.813 PROFILE HEATSINK
8 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 224.53
Cobs power watts: 202.08
Total voltage forward: 206.20
Total lumens: 34396.19
Total PAR watts assuming 10% loss: 94.38
Total PPF: 509.65
PPFD based on canopy area: 685.73
PAR watts per sq.ft.: 11.80
Cob efficiency: 51.89%
Power watts per sq.ft.: 25.26
Voltage forward per cob: 51.55
Lumens per watt: 170.21
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 97.00
umol/s/W: 2.52 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 115 inches
Heatsink length active cooling @40cm^2/heatwatt: 38 inches
COB cost dollar per PAR watt: $0.97
Electric cost @12/12 in 30 days: $8.08
Electric cost @18/6 in 30 days: $12.12
Cost per cob: $23.0
Heatsink cost per inch cut: $0.66
Total cobs cost: $92.0
Total heatsink passive cooling cost: $75.90
Total heatsink active cooling cost: $25.08

Your driver will be higher than 90% efficiency so electrical costs and power at the wall will differ:weed:
Click to expand...
wow dude. Every question i had is now answrred. With one post. Thanks coreywebster, i have my head on straight with all the numbers and data. Now i just have to wait for them to arrive. Your awesome bro. Thanks again.
 
coreywebster

coreywebster

Well-Known Member
berten-ernie420 said:
wow dude. Every question i had is now answrred. With one post. Thanks coreywebster, i have my head on straight with all the numbers and data. Now i just have to wait for them to arrive. Your awesome bro. Thanks again.
Click to expand...
No worries, all the data is from the COB calculator thread on here somewhere, its a tool you can download. Credit goes to bggrass and those who helped with the input data.
I just love playing around with it and passing on info where possible.
heres a link to the citi version
https://www.dropbox.com/s/2s0xo583lw10m29/CitiCalculator.jar?dl=0

and to the thread itself

https://www.rollitup.org/t/diy-cob-led-calculator.890214/page-11
 
berten-ernie420

berten-ernie420

Well-Known Member
coreywebster said:
No worries, all the data is from the COB calculator thread on here somewhere, its a tool you can download. Credit goes to bggrass and those who helped with the input data.
I just love playing around with it and passing on info where possible.
heres a link to the citi version
https://www.dropbox.com/s/2s0xo583lw10m29/CitiCalculator.jar?dl=0

and to the thread itself

https://www.rollitup.org/t/diy-cob-led-calculator.890214/page-11
Click to expand...
I mustve spent 3-4 hrs looking for an active link the othrr night to both the calc and the spread. It sucks when all you have is a mobile phone and those calculators and spreads dont pike to work with my phone.
So to get all the info in a post is invaluable to me. Thanks again corey, bgg, & supra.
 
Last edited:
berten-ernie420

berten-ernie420

Well-Known Member
Hey fellas, got most of the parts today to start building, but i havent gotten the cobs yet so im just piecing the light together without the cobs right now. Quick question, why arent my holders lining up with the reflector adapters? I have the following part numbers, for the clu048-1818's-
Ideal chip lok holders 50-2204CT
Ideal reflector 50-2100AN
MechaTronix 120mm passive pin heatsink supposedly predrilled and tapped, but something isnt aligning for me. Am i missing something? The sooner the reply the better..thanks guys.
 
P

Pulses

Member
coreywebster said:
FULL POWER

1818 3000K70Min 4 COBS @1400 mA ON 1.813 PROFILE HEATSINK
8 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 329.46
Cobs power watts: 296.52
Total voltage forward: 211.80
Total lumens: 48005.12
Total PAR watts assuming 10% loss: 131.72
Total PPF: 711.30
PPFD based on canopy area: 957.04
PAR watts per sq.ft.: 16.47
Cob efficiency: 49.36%
Power watts per sq.ft.: 37.06
Voltage forward per cob: 52.95
Lumens per watt: 161.90
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 151.22
umol/s/W: 2.40 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 180 inches
Heatsink length active cooling @40cm^2/heatwatt: 60 inches
COB cost dollar per PAR watt: $0.70
Electric cost @12/12 in 30 days: $11.86
Electric cost @18/6 in 30 days: $17.79
Cost per cob: $23.0
Heatsink cost per inch cut: $0.66
Total cobs cost: $92.0
Total heatsink passive cooling cost: $118.80
Total heatsink active cooling cost: $39.60

70% POWER

1818 3000K70Min 4 COBS @980 mA ON 1.813 PROFILE HEATSINK
8 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 224.53
Cobs power watts: 202.08
Total voltage forward: 206.20
Total lumens: 34396.19
Total PAR watts assuming 10% loss: 94.38
Total PPF: 509.65
PPFD based on canopy area: 685.73
PAR watts per sq.ft.: 11.80
Cob efficiency: 51.89%
Power watts per sq.ft.: 25.26
Voltage forward per cob: 51.55
Lumens per watt: 170.21
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 97.00
umol/s/W: 2.52 LER: 328.00 QER: 4.86
Heatsink length passive cooling @120cm^2/heatwatt: 115 inches
Heatsink length active cooling @40cm^2/heatwatt: 38 inches
COB cost dollar per PAR watt: $0.97
Electric cost @12/12 in 30 days: $8.08
Electric cost @18/6 in 30 days: $12.12
Cost per cob: $23.0
Heatsink cost per inch cut: $0.66
Total cobs cost: $92.0
Total heatsink passive cooling cost: $75.90
Total heatsink active cooling cost: $25.08

Your driver will be higher than 90% efficiency so electrical costs and power at the wall will differ:weed:
Click to expand...
Corey could not get link to work. Could you possibly give me same info with 4 clu058-1825 3500k citis with two hlg-240h-c2100 drivers
 
CobKits

CobKits

Well-Known Member
berten-ernie420 said:
Last pic is kind of shitty, but if u look close, the holes are not even close. Did i get the wrong parts??
Click to expand...
the reflector adapters mount using separate holes in the heatsink, which should be visible thru the big slots in the holders. i believe you need to break away the first tab of the adapters for them to clear the holders
 
coreywebster

coreywebster

Well-Known Member
Pulses said:
Corey could not get link to work. Could you possibly give me same info with 4 clu058-1825 3500k citis with two hlg-240h-c2100 drivers
Click to expand...
No probs. But I have used the same square footage because you didn't specify otherwise. Change the driver efficiency to 95% but since I don't know your electricity costs that's all pie in the sky anyway. I imagine your more interested in the PPFD so here ya go. Also I guessed at 80cri instead of 90cri. If are covering a different area then just post your info. :-D

1825 3500K80Min 4 COBS @2100 mA ON 1.813 PROFILE HEATSINK
8 SQ.FT. CANOPY 95% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 470.77
Cobs power watts: 447.23
Total voltage forward: 212.97
Total lumens: 72516.75
Total PAR watts assuming 10% loss: 194.82
Total PPF: 1041.21
PPFD based on canopy area: 1400.94
PAR watts per sq.ft.: 24.35
Cob efficiency: 48.40%
Power watts per sq.ft.: 55.90
Voltage forward per cob: 53.24
Lumens per watt: 162.15
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 232.56
umol/s/W: 2.33 LER: 335.00 QER: 4.81
Heatsink length passive cooling @120cm^2/heatwatt: 276 inches
Heatsink length active cooling @40cm^2/heatwatt: 92 inches
COB cost dollar per PAR watt: $0.82
Electric cost @12/12 in 30 days: $16.95
Electric cost @18/6 in 30 days: $25.42
Cost per cob: $40.0
Heatsink cost per inch cut: $0.66
Total cobs cost: $160.0
Total heatsink passive cooling cost: $182.16
Total heatsink active cooling cost: $60.72
 
coreywebster

coreywebster

Well-Known Member
Pulses said:
Found it just need find profile for sst-x heatsink
Click to expand...
Sorry was a bit late, didn't see this message. Cant help when It comes to heat sink profiles I'm afraid, I only use it to get an idea of ppfd and what options are available to create the range I want. When it comes to heat sinks I don't have the luxury of been able to order the profiles available to you US citizens so I go for pin heatsinks and that's a different kettle of fish.
When it comes to heat sink profies like heat sink USA sell you can work out the required profile and length, theres some threads on here somewhere or check out growmau5s video tutorial (youtube) on heat sink profiles, you should be able to calculate your needs.
If you go the route of pin heat sinks then the data for heat dissipation should be available from the manufacturer or seller. :weed:
 
sixstring2112

sixstring2112

Well-Known Member
berten-ernie420 said:
Last pic is kind of shitty, but if u look close, the holes are not even close. Did i get the wrong parts??
Click to expand...
it does appear you have the wrong parts.the chip holder and reflector adaptor are usually offset by 90 degrees and so are the holes in the heatsinks.i would say use bare cobs anyways,its more gooder :eyesmoke:
 
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