2x2 tent, cob setup question

thetr33man said:

With cobs you can veg/flower with the same spectrum, many people do. Currently Im using 4000k for veging lettuce, tomatoes and peppers. My favorite cobs Im running right now are 3000k 90cri which I bought over a year ago, but seem to be getting some additional attention lately. Its really up to you but I wouldnt go over 4000k or under 3000k.

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OK I'm in. Maybe a day I will use it for peppers too (I am interested in growing greens and veggies too).
BTW if I have to get a cob setup only for vegetative stage, what is the best K temperature?

thetr33man said:

This is all you need for veg.... 4000k 1212 driven at 1.4a, I redid this using a holder tho... $12 for cob $10 for heatsink $15 for power $5 for cord, etc...

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You sure made this easy! I copied this, except Im using 1.5a driver from ebay and 75w heatsink from cobkits. Just need 4' of alum angle iron, some nuts and screws

hello! does anybody know how many Volts need 1212 3500K 80 cri run at 1.4A?
Do you know also lm/w at 1.4A by any chance? looking on citizen datasheet i coudn't find anything.
Max ampere from datasheet is 1.38A , 58.8W so should be 42.6V at 1.38A.

I'd like to run 5 cobs at ish 45W each one for a 2.3 tent but if i can' t use a 1.4A driver what could i do?...regards!

rocho said:

hello! does anybody know how many Volts need 1212 3500K 80 cri run at 1.4A?
Do you know also lm/w at 1.4A by any chance? looking on citizen datasheet i coudn't find anything.
Max ampere from datasheet is 1.38A , 58.8W so should be 42.6V at 1.38A.

I'd like to run 5 cobs at ish 45W each one for a 2.3 tent but if i can' t use a 1.4A driver what could i do?...regards!

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I was confused about this too but apparently they run at just over 36v at 1.4 amps (1400ma) which means you can run 4 of them on a hlg 185h c1400. Each cob would run at 50w unless you dim them.

sorry i was wrong, my question was about 1206, not 1212
clu038-1206c4-353m2k1

so now the choice is above (I can't find 3500K CRI80 at a good price in europe)
CLU048-1212C4-403M2K1 (4000K- CRI80- 153 lm/W)
and
CLU048-1212C4-353H6K2 (3500K-CRI90- 119 lm/W)
5COBs run at 1.4A...i don't know actual voltage at 1.4A but i think i'd get more than 240W at full power(isn't it?)
I would like a veg+bloom spectrum...4000K is of course more efficient but 3500 has higher CRi and maybe a more cpmplete spectrum...but i'm asking you the best choice to do, i'm a quite complete ignorant in this field.

I chose the 1212 90 cri 3500k over the 80 cri because I preferred the spectrum. The reds peak at 630.

wayward1 said:

I chose the 1212 90 cri 3500k over the 80 cri because I preferred the spectrum. The reds peak at 630.

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many thanx for your answer!
What about yield with your lamps?
I'd think to use one hlg-240-1400b driving 5 of these COBs, may be a good setup in your opinion?
Do you also use the holders with our citizen? if yes yes could i know the reason, they seem not solderless , maybe are they usefull to mount reflectors?
sorry for my lots of questions!!

CLU048-1212C4-403H5K2 (4000k- CRI90- 126 lm/W) ON BBL type
CLU048-1212C4-403M2K1 (4000K- CRI80- 153 lm/W) STANDARD type
CLU048-1212C4-353H6K2 (3500K-CRI90- 119 lm/W) BELOW BBL type

as i asked in another 3d what does BBL mean?

Yes, get the BJB holders @rocho. You dont have to solder the cobs and reflectors just twist in, go for the 80cri 4000k for veg, its what I use anyway

The product code for the bjb holder is which fits the clu048 series is
47.319.2033.50
They are solderless and easy to use.

Thanx to all...visajoe1 i need a spextrum sweetable for veg+bloom