Temp and humidity ? Start of veg!

Alrighty so I have a new setup- 4' tall x 4' long x 2' wide self made growbox. Top corner has a 6" exaust fan pushing 250ccm I believe and a hell of an intake fan at bottom left of box. I have two 400w equiv 6500k cfls two 150w equiv cfls and eight 100w equiv cfls plan on adding more if i can get this issue situated... Now to the issue my temps with all lights on are chillin around the 85 to 90 degree mark which I dont like and my humidity is chillin round 30%. I've grown befor but never had issues like this i know i can get a humidifier to raise humidity but my box is full up I have an OG purple kush in a 5 gallon bucket a blue lemon thai in a 5 gallon bucket and 5 Pandora Autos in 3 gallon pots with no room to spare. What i dont get is why is it staying so hot in my box even with an exaust running to the attic and a bad ass lil fan on the side pushin in massive air from the room its in which sits about 72 to 75 degrees? This site has always been kind to me and any suggestions would be greatly appreciated. Thanks everyone n if you need more info please dont hesitate to ask.

30% humidity is ok, a little low for veg, but you can up it by replacing AC units with fans. in your case thats not a good idea becuase of your heat so just add in some wet towels hanging around, or open containers full of water so they evaporate and raise the humidity.

Why is your heat so high? no idea your using CFLs which dont make much heat, id try adding in fans, or some vent holes to get it all moving around. also, where is it 85-90 degrees? check right where the canopy of the plant is. with higher temps, it may be good to remove some of the fan leaves to help air flow, but thats not great to do during veg.

I actually have my temp and humidity gauge sitting on the top of the pots since there all so close together directly in the middle of my box. Ya im stupified as to why it is so hott especially since this is a cfl grow i was thinking of adding another intake fan i bought two of them but assumed I would only need 1 at the time guess i was wrong?! For now i shut off all of my lights except my two 400 watt cfls and added a very small fan to help push the hot air up towards my exaust. Seems to be okay now but I need to have all my lights going this just isnt gonna cut it only having two lights going.