400W 800PPFD in a 4x4 can it be done?

Randomblame

Randomblame

Well-Known Member
Airwalker16

Airwalker16

Well-Known Member
Randomblame said:
I would not invest into 40 1212's, but If you like Citizen COB's, here is the CLU048-1818C4353H5 in 3.500k, Ra90 on B.B.L,
for 16,80€ each +VAT = ~400,-€ for twenty COB's. (other spectrums and COB's also available)

And remember this:
20x CLU048-1818=20x 324=6480 LED's vs. 40x CLU048-1212=40x 144=5760 LED's = 12,5% more LED's
and surely more light at the same current...

Where to buy?
http://www.tme.eu/en/details/clu048-1818c4353h5/white-power-leds-cob/citizen/clu048-1818c4-353h5k2/
Click to expand...
Tme has some great prices on not only COBS but Heatsinks! I wonder how much shipping to USA would be? It says 9.99 for DHL or UPS per 5kg.
 
MeGaKiLlErMaN

MeGaKiLlErMaN

Well-Known Member
a mongo frog said:
So your getting 3.37 pounds out of a 16 square foot foot print? I know your a good grower, but thats not happening.
Click to expand...
Hey a guy can dream, I would love to have that quantity and quality but it wasn't the best grow.. Time will tell, I have the light optimized, the temp of the room, water/ nutes, only thing missing is preventative maintenance from bugs. I'm not saying I'll hit that make but only that I should. My current setup is 1100-1200 PPFD... So twice as much as a Gavita.

Just saying numbers talk, but I will walk them out to see if it works out and find out why if not
 
MeGaKiLlErMaN

MeGaKiLlErMaN

Well-Known Member
Randomblame said:
I would not invest into 40 1212's, but If you like Citizen COB's, here is the CLU048-1818C4353H5 in 3.500k, Ra90 on B.B.L,
for 16,80€ each +VAT = ~400,-€ for twenty COB's. (other spectrums and COB's also available)

And remember this:
20x CLU048-1818=20x 324=6480 LED's vs. 40x CLU048-1212=40x 144=5760 LED's = 12,5% more LED's
and surely more light at the same current...

Where to buy?
http://www.tme.eu/en/details/clu048-1818c4353h5/white-power-leds-cob/citizen/clu048-1818c4-353h5k2/
Click to expand...
Its close but its not the same


1818 4000K80Min 20 COBS @450 mA ON 5.88 PROFILE HEATSINK
16 SQ.FT. CANOPY 92% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 496.29
Cobs power watts: 456.59
Total voltage forward: 1014.64
Total lumens: 82558.48
Total PAR watts assuming 10% loss: 219.83
Total PPF: 1160.22
PPFD based on canopy area: 780.53
PAR watts per sq.ft.: 13.74
Cob efficiency: 53.50%
Power watts per sq.ft.: 28.54
Voltage forward per cob: 50.73
Lumens per watt: 180.82
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: 214.60
umol/s/W: 2.54 LER: 338.00 QER: 4.75
Heatsink length passive cooling @120cm^2/heatwatt: 99 inches
Heatsink length active cooling @40cm^2/heatwatt: 33 inches
COB cost dollar per PAR watt: $2.09
Electric cost @12/12 in 30 days: $17.87
Electric cost @18/6 in 30 days: $26.80
Cost per cob: $23.0
Heatsink cost per inch cut: $1.74
Total cobs cost: $460.0
Total heatsink passive cooling cost: $172.26
Total heatsink active cooling cost: $57.42

1818 4000K80Min 20 COBS @500 mA ON 5.88 PROFILE HEATSINK
16 SQ.FT. CANOPY 92% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 553.51
Cobs power watts: 509.23
Total voltage forward: 1018.45
Total lumens: 91428.15
Total PAR watts assuming 10% loss: 243.45
Total PPF: 1284.86
PPFD based on canopy area: 864.38
PAR watts per sq.ft.: 15.22
Cob efficiency: 53.12%
Power watts per sq.ft.: 31.83
Voltage forward per cob: 50.92
Lumens per watt: 179.54
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: 239.34
umol/s/W: 2.52 LER: 338.00 QER: 4.75
Heatsink length passive cooling @120cm^2/heatwatt: 110 inches
Heatsink length active cooling @40cm^2/heatwatt: 37 inches
COB cost dollar per PAR watt: $1.89
Electric cost @12/12 in 30 days: $19.93
Electric cost @18/6 in 30 days: $29.89
Cost per cob: $23.0
Heatsink cost per inch cut: $1.74
Total cobs cost: $460.0
Total heatsink passive cooling cost: $191.40
Total heatsink active cooling cost: $64.38
 
Randomblame

Randomblame

Well-Known Member
Airwalker16 said:
Tme has some great prices on not only COBS but Heatsinks! I wonder how much shipping to USA would be? It says 9.99 for DHL or UPS per 5kg.
Click to expand...
Hey airwalker,
I guess ~ 40 $ by international airmail/dhl ... same as jerry required! But could also be wrong. In their shipping list are only europian countries
so you have to email him for true infos!

BTW, because of the Citi's, I do not trust the official spreadsheets so much because of the known errors in some of them.
Considering they are the same generation (V5 in this case) there is no logical explanation, why the small 1212 should be so much more efficient as the 1818. Is this only a lucky punch?
Maybe I've not found a rational conclusion for this phenomenon but if anyone can enlighten me, I would be very grateful.
Keeping with this as example, the 1212 has 12 parallel strings @ 350mA = 29,167mA per string. The 1818 has 18 parallel strings running @ 450mA = 25mA per string.
Assuming the same LED's are installed, 1818 should be more efficient. That's why I can not trust the spreadsheet to 100%!
 
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Airwalker16

Airwalker16

Well-Known Member

Hey airwalker,
I guess ~ 40 $ by international airmail/dhl ... same as jerry required! But could also be wrong. In their shipping list are only europian countries
so you have to email him for true infos![/QUOTE]
I went to the USA shipping page and that's where I got that info so I dunno.
 
Malocan

Malocan

Well-Known Member
Randomblame said:
Are you sure? I've purchased many drivers from there and I'm not living in poland...
Click to expand...
yes im sure, they are only allowed to sell citizen cob to poland. Citizen it self told them to sell then only in poland..
i asked them allready 2 times via email, they gave me both time the same answer. They told me to contact offical distributer for germany..
 
PSUAGRO.

PSUAGRO.

Well-Known Member
23% difference between wet-dry weight!?.......... i'm pushing over 55%(have even topped 65%) generally before cure.

damn, I would have hit 2.5g/w on my osram run with that diff..........lol
 
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BullShark

BullShark

Active Member
Wow, I have no idea what the heck I'm reading here.:shock: I just want someone to tell me what pre assembled lights to buy to buy for a 3x5 tent! :bigjoint:
 
PSUAGRO.

PSUAGRO.

Well-Known Member
MeGaKiLlErMaN said:
Do you have a grow journal that shows this?
Click to expand...
show what ? the osram run?...........generally you cut/hang until the stem is almost snapping then into the bag/freezer/jars whatever...

the only thing I have documented on here showing the diff is my #3rd party cup win

WET weight at the bottom of the page 106.g
https://www.rollitup.org/t/3rd-party-cup-growoff-official-update-thread.700720/page-25
DRY weight on the next page after a couple of days 25.6g
https://www.rollitup.org/t/3rd-party-cup-growoff-official-update-thread.700720/page-26
 
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