need help with venting issue

text is 3 x4x5' ft
pics are of the cieling I could possibly vent into but I was wondering if it would cause problem /w heat n humdity if I only run two t5s and cfls?

right now it's venting 25ft out then out the window but it;s causin a lot of echo and the temps are in the high 80s.
I have a diy booster duct fan that is probably 100 or 200 cfm on high since it sucks the tent inward...

just wondering if it is too skechy to cut a hole in the top here to vent?

I apologise in advance for this thread cause I know these so many on here about venting but just can;t figure it out

bump. temps are a little lower now with only one t5 in the tent but still looking to cut a hole in the closet cieling to vent into the attic. would that add a dangerous amount of heat and humidity up there with only cfls??