another noob diy cod thread lol

[broonski]

hey guys been a member here for ages but dont post much as wot im doing has basically been done to death lol
i grow in a 2 metre by 2 metre tent with 16 plants scrogged with 4 600w hps above in coco airpots
i hit 1gpw or close to ie 70+oz a grow
i have recently been looking into led grow lights and found the usual suspects ie mars led ect
i need to move to led because i run air cooled lights and fans full blast to cool room but new nieghbours and its too noisey and they are too nosey.
dont want to be long winded or anything but is it realistic to replace the 4x600w hps with led?
i have about $2k i reckon to do so?
ive been reading about cobs ect and have contacted jerry at kingsbrite about the following cob
CREE CXB3590 3500K CD, CXB3590-0000-000R0HCD35G 72v
was going to run them at 1.4a so 6 cobs should give me 89k lumens at 600ws roughly
am i on the right tracks lol?

 

[bicit]

Sounds like you're on about the right tracks. What do you have in mind for a heatsink? Drivers? Mounting hardware? Wire?

The cobs steal the spot light, but its the support crew that keeps the show on the road

Also if you're trying to reduce ambient temps you either need an ac, or to reduce tour overall power consumption. Especially since your moving from vented lights to non vented.

Heat is power displacement. Keep that in mind and eliminate every stray watt from your grow room to reduce the temps.

 

[broonski]

Sounds like you're on about the right tracks. What do you have in mind for a heatsink? Drivers? Mounting hardware? Wire?

The cobs steal the spot light, but its the support crew that keeps the show on the road

Also if you're trying to reduce ambient temps you either need an ac, or to reduce tour overall power consumption. Especially since your moving from vented lights to non vented.

Heat is power displacement. Keep that in mind and eliminate every stray watt from your grow room to reduce the temps.

hiya mate first off thanks for the responce not always easy speaking to someone who hasnt got a clue about this stuff lol
so think easy way to think about wot i have in mind is just making a light to replace 1 of my 600w hps then copy that over to the others?
i was thinking 2 of these heatsink.its 8 inch wide and 2.7inches high maybe 800mm long with 3 cree cxb3590s on each one
http://www.bal-group.com/heatsink_detail/80
drivers all i know is meanwell do the best ones lol and would prefer 1 driver per heatsink to run 3 cobs?
ps im in the uk so sorry if i talk about wrong measurments ect lol

 

[littlejacob]

Bonjour
Wow you are going to run them hard...I'm going to run them at 1400mA too,but the 36V and not the 72V.
For the driver it is the hlg-185-1400(a or b) you will need and 4 3590 fits on it(I bought a 1000x165x35 mm heatsink that I cut in 4 pieces and added a 140mm fan on it.)
I have a good site for h.s in U.E,very good price and shipping.TME
Have a nice day

 

[bicit]

Bonjour
Wow you are going to run them hard...I'm going to run them at 1400mA too,but the 36V and not the 72V.
For the driver it is the hlg-185-1400(a or b) you will need and 4 3590 fits on it(I bought a 1000x165x35 mm heatsink that I cut in 4 pieces and added a 140mm fan on it.)
I have a good site for h.s in U.E,very good price and shipping.TME
Have a nice day

Since he's wanting to run the 72v version he would only be able to fit two emitters on each driver. He'll need 3 drivers to make a 600W lamp.

Also, looks like the heatsink you have picked out might be a bit too small by my calculations. I'm getting about 4,300cm^2 of surface area, even actively cooled it would only be good for about 2 cobs, not three like you were hoping.

 

[littlejacob]

Bonjour
How efficient are the 72V @1400mA?(I knew that he talk about 72v,but many growers use them at lower amp for better efficiency, so...)
Is the heatsink i talk about is good enough for his need?
Have a nice day