Lighting Autocob and Apollo 11 Grow

[BmC76]

Ladies right at lights out this morning.

They're looking nice and green and the lights seem to be keeping them happy.
I had to increase my exhaust fan speed because when I got up this morning, the temp inside the cab was 97°! With 3 lights, the temp was sitting around 85°.
Unfortunately, I had to leave for the weekend so I'm not sure if the increased fan speed is going to work...guess I'll find out if I come back to fried plants, lol.

 

[BmC76]

Well, the ladies weren't fried when I got home so that's a plus, but I either need to rework my ventilation or remove a cob because the temps still got up to 91°. Running 2 panels in the space before (250w true), my temps never got above 87°. Now that I'm running with 220w in cobs, I'm actually getting higher temps. My exhaust is a 4", 190CFM fan, currently being ran at 50%. The space is only 20"x20"x65" (15CF) so the fan should be more than enough to keep the temps down.
Anyways, here they are...

 

[DH22]

I'm subbed in @BmC76 looks good buddy

 

[DH22]

Ladies right at lights out this morning.
View attachment 741841
They're looking nice and green and the lights seem to be keeping them happy.
I had to increase my exhaust fan speed because when I got up this morning, the temp inside the cab was 97°! With 3 lights, the temp was sitting around 85°.
Unfortunately, I had to leave for the weekend so I'm not sure if the increased fan speed is going to work...guess I'll find out if I come back to fried plants, lol.

I'm liking the screen I think I might need one!!!

 

[Proph]

How many cobs are you running in total now?

 

[BmC76]

Hey, thanks DH!
Yeah, I love using a net. Makes things a lot easier for sure.

Prophetiko,
I'm currently running 4. I may throw caution into the wind and try 5 if I can keep my temps down, lol.

 

[Proph]

Sheeesh! Thats a TON of light in that space. Sounds like you need to kick that inline fan from 50% to 100%. That should help some if you're really trying to fit 5 in there. I have a 32×32 with 3 and a 6" inline at around 30% and it doesnt get ovet 80 degrees F.

 

[BmC76]

Yeah, I completely agree about it being a ton of light. The 5th light would only be 36w though...a 6500k during the last 2wks.
Re the exhaust...I believe I found my issue. When I designed the cab, I planned on running it with both sides in use. Since only one side is in use and I blocked the intake holes on the other side, I need to drill 2 more 2" holes to suck from the right side...if that makes sense. Basically, 4" exhaust fan is trying to pull air through 4" opening when it should be 8". The cab has 2 2" intake holes on both sides to make up that 8", but again, since I blocked the other side, there's a restriction in the air flow.

 

[BigSm0]

Got me a little nervous there. The temps shouldn't be a problem. 220watts is just over 900 btu's of heat but easily manageable with an exhaust fan. The 2-2" holes have a much smaller area than the 4" exhaust side. Having 2-4" holes should definitely do the trick.

 

[BmC76]

So the ladies will be entering wk 4 of flower tomorrow. Cobs are 16" from the tallest cola and still getting about 82k lux in the center of the canopy.
They're looking a lighter shade of green so I need to up my N or feed them everyday. Right now they're getting 7g/gal of maxibloom in a feed, water, feed schedule.

I think I've finally settled on the cob config I want to run for the remaining flowering period:
2 4000k 97cri &
2 2700k 90cri

I plan to swap the 3500k out tomorrow with the 4000k if all goes as planned.