Advice for a COB 3'x3' Flower Area

[Mike Cap]

i'm trying to replace a piece of shit Mars II 1200 in a 3'x3' area of my flower room.

Will this design cover it?

 

[CobKits]

I like 4x75w in a 3x3

 

[Mike Cap]

I like 4x75w in a 3x3

I wanted to do that, however I would have to wait a few weeks on the heatsinks, so I decided to go with 300w with 6 36v @ 1400mA

 

[thetr33man]

Part Number:
MODULED GIGA 15250-B

Dissipated Power Pd:
75 W
Theres a bunch at CDI...

 

[Mike Cap]

Part Number:
MODULED GIGA 15250-B

Dissipated Power Pd:
75 W
Theres a bunch at CDI...

it looks like those are setup for the citizen COB. thanks for the site though
I bought 8 of the SST x that @robincnn has on his site, but he is currently out of stock.

 

[sleepless_canuck]

I run 4 x CLU1825 3500k @ 113 max a piece and it is perfect.

I only have a lux meter but on 16" centers the canopy gets pretty damn even lighting.

If I was going to run more than 4 I would look at the CXM22s.

Or run 4 x Quantum boards. They are in stock as well as slate 2 sinks right now.

 

[Mike Cap]

I run 4 x CLU1825 3500k @ 113 max a piece and it is perfect.

I only have a lux meter but on 16" centers the canopy gets pretty damn even lighting.

If I was going to run more than 4 I would look at the CXM22s.

Or run 4 x Quantum boards. They are in stock as well as slate 2 sinks right now.

What are your LUX readings at 18"?

 

[Stealthstyle]

Im running 4 50 watters in a 2ft by 2 ft it seems too much.

 

[Mike Cap]

Im running 4 50 watters in a 2ft by 2 ft it seems too much.

I just read this page ...
https://www.rollitup.org/t/max-ppf-ppfd-with-and-without-co2.921830/
i wont be concerned about that with the 3x3 area however it is in the area where I have other COB bars, and I am running Co2.
I just watched @Growmau5 video and looks like i may be covered.
Why do you think its to much?

 

[Stealthstyle]

Well too much for my seedlings at 21 inches away and its hot here. gets down to 29c in my tent and 34 max in my tent at seedling level. i fried a few good seeds such as 7 herijuana seedlings. the others are going fine. But on critical jack is showing signs of either heat stress or over fert or both. only minor as im feeding at 1/3 strength. (gh maxigrow and seedling feed from a hydro store) the other three- two paki valleys are fine, with the cotton candy loving it, even looks like it needs more food.

Its hot outside, around 38'c and 25c at 3-4 am

 

[klx]

I run 4 x CLU1825 3500k @ 113 max a piece and it is perfect.

I only have a lux meter but on 16" centers the canopy gets pretty damn even lighting.

If I was going to run more than 4 I would look at the CXM22s.

Or run 4 x Quantum boards. They are in stock as well as slate 2 sinks right now.

This ^. Stick 400W in a 3x3 and let there be light. We wanna grow fat, dank buds, light the shit out of the joint.

 

[sleepless_canuck]

This ^. Stick 400W in a 3x3 and let there be light. We wanna grow fat, dank buds, light the shit out of the joint.

It worked out to about 900ppfd I was pushing.

Can't remember exact lux numbers before doing math.

But I pulled 17 ozs out of a 3x3 and it vegged under a Mars. First indoor grow.

I expect this round to be much better.

 

[sleepless_canuck]

Just did a reading, and I am getting about 350 Par @ 30" with my cobs running at 230 watts. So just under 60 per cob.

I will bump up to about 400-500 par during veg and then 8-900 during flower.

 

[Mike Cap]

Took 2hr to build