What LEDs for 3x3 tent?

Evil-Mobo said:

There are no temp issues with a 315. You get an affordable plug and play light with a proper complete spectrum of light.

You can also get an A/C hood if you deem it necessary but that is rarely the case. You need to listen to people who have actually used the lights they're talking about and not guys going off of bro science and have no experience.

But if you are going to go COB I commend you for taking the DIY route.

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Snucks said:

Who was going off bro science? I've been going by what everybody on here has said... you being one of them. ha. and forming my own opinion. Which is why earlier In this thread I said I would consider the cmh and also as why I am highly considering building my own cob, per what people here recommend.

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Evil-Mobo said:

I was not referring to you bro calm down lol. You have certain people giving you advice on products with no experience with said products. It's up to you to weed out the facts is all I am saying.

There will be no more heat issue with a 315 than with COB's in it's place in a 3x3. As I have stated before already My SS315 with the ballast on the light ran 5-10 degrees cooler in my 3x3 (not air cooled) than my old Tasty T4-2100 light. The CMH brought out nicer color in the plant too.

My first ever grow, SS315 in a 3x3 yield was 1/2 lb dry 8 week veg. Just the one plant.

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sixstring2112 said:

Curveball time. ..go with cree 2700k and 3000k driven @ 1050ma click..voom..pow lol.
View attachment 3853247 View attachment 3853248

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Snucks said:

Lol I was in no way heated in that reply. But yeah, if I did happen to go with the cmh what else would I need to buy for the tent? Would I need in line or exhaust?

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Snucks said:

Lol I was in no way heated in that reply. But yeah, if I did happen to go with the cmh what else would I need to buy for the tent? Would I need in line or exhaust?

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Hybridway said:

Six has shown me to many of these taller plants/colas types for Me to not publicly retract my statements I've made in the past about soft cobs only being useful to the tops of scrogs.
Personally I buy pre-built fixtures & like my cobs over the 50% mark as to get the most out of the fixture I buy.
But, there's no denying the soft cobs their place.
@MeGaKiLlErMaN, I'd like to apologize to you for saying your soft ran fixture will not grow you long buds. I got to caught up in the par #'s & drop affiliated w/ softer cobs. My bad! I think I was even rudish about it that day.
Six, thanks for sharing your results here on this forum.
I was wrong although I still prefer mine to run over the 50% line.
To each his own. The #'s & science aspect of this game can confuse people sometimes. It's the results that matter.
Peace!

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Hybridway said:

Six has shown me to many of these taller plants/colas types for Me to not publicly retract my statements I've made in the past about soft cobs only being useful to the tops of scrogs.
Personally I buy pre-built fixtures & like my cobs over the 50% mark as to get the most out of the fixture I buy.
But, there's no denying the soft cobs their place.
@MeGaKiLlErMaN, I'd like to apologize to you for saying your soft ran fixture will not grow you long buds. I got to caught up in the par #'s & drop affiliated w/ softer cobs. My bad! I think I was even rudish about it that day.
Six, thanks for sharing your results here on this forum.
I was wrong although I still prefer mine to run over the 50% line.
To each his own. The #'s & science aspect of this game can confuse people sometimes. It's the results that matter.
Peace!

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Yodaweed said:

I highly doubt you can build an LED to cover a 3x3 for cheaper than you can buy a 315 CMH , and they don't put off much heat.

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MeGaKiLlErMaN said:

Much cheaper actually. And this is a 4x4


Citizen.1212C4.3000K 16 COBS @1.05A ON 1.813 PROFILE HEATSINK
16 SQ.FT. CANOPY 94% EFFICIENT DRIVER @15 CENTS PER KWH
Total power watts at the wall: 625.53
Cobs power watts: 588
Total voltage forward: 560
Total lumens: 91140
Total PAR watts assuming 10% loss: 249
Total PPF: 1210.14
PPFD based on canopy area: 814.11
PAR watts per sq.ft.: 15.56
Cob efficiency: 47.09%
Power watts per sq.ft.: 36.75
Voltage forward per cob: 35.0
Lumens per watt: 155.0
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: 311
umol/s/W / CRI: 4.86 / 80CRI
Heatsink length passive cooling @120cm^2/heatwatt: 370 inches
Heatsink length active cooling @40cm^2/heatwatt: 123 inches
COB cost dollar per PAR watt: $0.81
Electric cost @12/12 in 30 days: $34.28
Electric cost @18/6 in 30 days: $51.17
Cost per cob: $12.55
Heatsink cost per inch cut: $0.66
Total cobs cost: $201
Total heatsink passive cooling cost: $244
Total heatsink active cooling cost: $81

Or

Citizen.1212C4.3000K 16 COBS @0.7A ON 1.813 PROFILE HEATSINK
16 SQ.FT. CANOPY 94% EFFICIENT DRIVER @15 CENTS PER KWH
Total power watts at the wall: 404.26
Cobs power watts: 380
Total voltage forward: 542
Total lumens: 62320
Total PAR watts assuming 10% loss: 171
Total PPF: 831.06
PPFD based on canopy area: 559.09
PAR watts per sq.ft.: 10.69
Cob efficiency: 50.07%
Power watts per sq.ft.: 23.75
Voltage forward per cob: 33.9
Lumens per watt: 164.0
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: 190
umol/s/W / CRI: 4.86 / 80CRI
Heatsink length passive cooling @120cm^2/heatwatt: 226 inches
Heatsink length active cooling @40cm^2/heatwatt: 75 inches
COB cost dollar per PAR watt: $1.17
Electric cost @12/12 in 30 days: $22.33
Electric cost @18/6 in 30 days: $33.25
Cost per cob: $12.55
Heatsink cost per inch cut: $0.66
Total cobs cost: $201
Total heatsink passive cooling cost: $149
Total heatsink active cooling cost: $49

Or even harder if you really want to


Citizen.1212C4.3000K 16 COBS @1.4A ON 1.813 PROFILE HEATSINK
16 SQ.FT. CANOPY 94% EFFICIENT DRIVER @15 CENTS PER KWH
Total power watts at the wall: 860.64
Cobs power watts: 809
Total voltage forward: 578
Total lumens: 118114
Total PAR watts assuming 10% loss: 324
Total PPF: 1574.64
PPFD based on canopy area: 1059.33
PAR watts per sq.ft.: 20.25
Cob efficiency: 44.51%
Power watts per sq.ft.: 50.56
Voltage forward per cob: 36.1
Lumens per watt: 146.0
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: 449
umol/s/W / CRI: 4.86 / 80CRI
Heatsink length passive cooling @120cm^2/heatwatt: 534 inches
Heatsink length active cooling @40cm^2/heatwatt: 178 inches
COB cost dollar per PAR watt: $0.62
Electric cost @12/12 in 30 days: $46.97
Electric cost @18/6 in 30 days: $70.21
Cost per cob: $12.55
Heatsink cost per inch cut: $0.66
Total cobs cost: $201
Total heatsink passive cooling cost: $352
Total heatsink active cooling cost: $117

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Evil-Mobo said:

Yup, and he has to build it and still has no IR or UV

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Danielson999 said:

Building it is part of the hobby and fun. Having IR and UV isn't going to do much anyway and if he wants it that bad he's better off adding a reptile bulb he can turn off while he's around his plants so he doesn't damage his eyes, or run it on a separate timer so it's off when you're around them.

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Evil-Mobo said:

I'm not getting into anymore pissing contest over COB's brother. We are all entitled to our opinions, mine are based on feedback from growing in real life with a real garden and actually using the technologies discussed.

Thanks

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Danielson999 said:

What does this have to do with cobs vs anything? Are you naturally that sensitive or just looking to start an argument over nothing? You made a comment about having to build a light and still have no uv/ir. I said building is half the fun and you can add uv light yourself. No need taking it where it doesn't belong going....

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Evil-Mobo said:

Sensitive? Whos arguing? A lot of accusations you're throwing around there bud.

Have a good night lol

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Danielson999 said:

Nobody was arguing. Until you mentioned you didn't want to get into a pissing contest out of nowhere. Go get some sleep.

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Evil-Mobo said:

So who's the sensitive one ? All you do is fill threads with your passive aggressive attitude. I was talking to the OP so why exactly did you get involved? But you're trying to tell me I want to argue? Was I speaking to you? Did I quote you? No not until you started up with me again. You always have to step in right? No one can have an opinion different than yours even if based on real world feedback right? It's only what you say and nothing else? Lol. This section is titled LED and other lighting not LED only. So give it a rest already.

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Danielson999 said:

I don't care if you were speaking to me, it's a public forum. We are all entitled to our opinions and these threads are meant for discussion which is why I originally stated my opinion about building lights as being part of the fun of this hobby. And yes, you fill these threads with all your bs too so stifle the attitude. No point ruining another thread is there? These threads are meant for people to talk about lights, not just the people you want to hear from. Get over it. If you weren't so sensitive to begin with and started right in with the 'pissing contest' bs, we wouldn't have even typed another word about this crap. You done now? Cuz I am.

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