4x4 tent - 8 COB 1 Heatsink. Enough coverage?

S

Seriousbuds

Active Member
I am planning to do a 4x4 tent grow with 8x CXB 3590s on a 10" by 24" heatsink

Heat sink is already purchased and I just did a little reading that suggests I won't have optimal light coverage..

Concerning - would getting lens/reflectors help this issue?

Additionally I'm under the 30w/sqft threshold - do you guys think this is enough for the tent or will I need supplemental lighting?
 
Another heasink or cut that one in half the long way is what I would do.
You could even cut it into 4 pieces spaced out and mounted on angled aluminum bars
 
I'm in the process of building my 1st LED array. I'm using (16) CXB 3590's and (4) Heatsinks with each measuring 5"x34". My projected coverage is going to be slightly less than 4'x4' so yes, you probably are going to have coverage issues. I just started drilling this evening and I'm kind of learning as I go but show some pics...we're all here to help.
 
Fuck.

Well then plan B is to just build this panel and use it for a bedroom armoire stealth cabinet.. maybe even build a seperate bar for vegging in the bottom, then ill have a super quiet setup where i sleep
 
Seriousbuds said:
I am planning to do a 4x4 tent grow with 8x CXB 3590s on a 10" by 24" heatsink

Heat sink is already purchased and I just did a little reading that suggests I won't have optimal light coverage..

Concerning - would getting lens/reflectors help this issue?

Additionally I'm under the 30w/sqft threshold - do you guys think this is enough for the tent or will I need supplemental lighting?
Click to expand...

8 of those is plenty.

The 30w/ft threshold doesn't apply to CXB3590s.

8 CXBs at 2.1 amps can provide 100,000 lumens, 37W/ft in a 4x4. Cheap mono panels can't even be packed in tight enough to get that kind of coverage! Even at 1.4 amps and 25w/ft you still end up with over 70,000 lumens and 700PPFD. I would count the heatsink as a loss and redesign for better light spread though.
 
Rahz said:
8 of those is plenty.

The 30w/ft threshold doesn't apply to CXB3590s.

8 CXBs at 2.1 amps can provide 100,000 lumens, 37W/ft in a 4x4. Cheap mono panels can't even be packed in tight enough to get that kind of coverage! Even at 1.4 amps and 25w/ft you still end up with over 70,000 lumens and 700PPFD. I would count the heatsink as a loss and redesign for better light spread though.
Click to expand...

Is this because they put out more light?
Kinda makes me wish I bought those instead...oh well
 
I opted for four CXB3590 on a 200W Meanwell driver to get 56% efficiency. I crammed all the above onto a single heat sink about 27" long, actively cooled. I'll use four of these modules to light a 4'x6' trellis. I'm expecting 830 PPfd. I'm using more watts than that now; With the 860W CDM I'm running, I'm getting less than half that PPfd... and I'm spending over 900W/trellis.
 
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