My First Grow Journal!! With Pictures!!

I got 4 bag seeds going in my closet box set up. Using a variety of cfl's from day light to soft whites and I have a intake and exhaust inline duct fan running through a carbon filter scrub, but still having heating issues when I close the door. The inline duct fan I'm using for the exhaust is the 4" suncourt in-line inductor fan that is supposed to do 80cfm, but i feel little to no suction under my duct. I'm considering buying the 6" version which is 160cfm or setting up a plexi glass compartment for my lights to keep the heat from hitting the plants. Any advice on ways to keep the heat out or why my set up isn't currently working would be appreciated. Also one of my plants is showing some yellow spots and I wasn't sure if that was nitrogen deficiency or because I had the lights to close one day. Take a look at the pics and tell me what you think. We used blood meal in the soil so I assumed that would cover the nitrogen.
 
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