Troubleshooting High Temps in my Cabinet with CFL Lighting

asims

Member
This is my very first grow and after doing a ton of research and reading on the subject, I decided to go with 6 giant 105 Watt (400W Equal) 6500k CFLs and 2 supplimental regular size CFLs in the lower Kelvin range to get a bit of balance. I also bought 4 giant bulbs in the 2k range for flowering. I built the cabinet using the top of the cabinet to mount 2 6 inch inline duct fans that are facing each other with a T Joint in the middle. I planted my first seed in my DWC bucket last night and put 2 bulbs in the cabinet. Set up the digital hygrometer/thermometer set the receiver right next to the rockwool and watched the temps as they climbed up to 95 degrees. That's with just 2 lights. I can't even begin to imagine how hot that cabinet would get with 6 bulbs inside.

I've unplugged the lights because the temps in the cabinet without lighting is a perfect 80 degrees and I expect to achieve germination in a few days. In the meantime I need to figure out a solution.

Is it possible that because the inline fans are facing each other at the T Joint that they are reducing the efficiency? I can disconnect the T Joint and see if that helps improve air flow. Otherwise the other option is to significantly reduce the amount of CFL's I had planned to use. That isn't really an option I want to consider because I am concerned about sacrificing my final quantity . My other option is to construct a make shift grow tent and hope that the extra square footage and room for more fans would be enough to combat the high light temperatures. I'd love some opinions on this.
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budslubs

Member
need pics for people to assist you, and how may plants for 6 bulbs?how big the cabinet?
i would put a intake at the bottom and a exhaust at the top. IMG_0855.jpg. pushes the hot air up and out it goes. my temps dont go above78 right now iwth 300 watts
 

asims

Member
I appreciate your assistance. :) Thank you.

Here are some pics that I've taken. The cabinet's measurements are
25-3/4" L x 19" W x 69-1/2" H. Based on those calculations I estimate that having 6 large CFL bulbs would get me the closest to 10,000 lumens per square foot. The first pic is the whole cabinet. I am growing 1 plant inside the space. The second pic shows 1 of the intake vent holes and there is another just like it on the opposite side of the bucket, we've placed a fan in front of it to try and bring in air. The third picture is showing the exhaust area above the top shelf. There was a T Joint connecting the two fans with the bottom of the T going into the grow space. We've since removed the T in hopes that it will help. That didn't work though, temps are still going up to 94 degrees with the two bulbs on.
When I had the sensor down in front of the fan it was measuring 85, but moving it up next to the rockwool is showing temps above 90 with lights on. Without lights its reading 80 degrees and 60% humidity.


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