Evaporative cooler my answer?

[PersonalProvide]

Hey everyone. I've recently installed a small tent inside my closet with a 250w hps. I have 4 fans circulating air inside the tent and another on the floor, in the closet doorway, aiming inside closet. I need to find a way to drop the temperature inside the tent 5 to 7 degrees. In your experiences would adding a fan higher off the ground pointing out of the closet suffice? Would an evaporating cooler do it? I don't believe a portable AC will work. Currently the fan exhausting the hot air is inside the tent aiming up and out. Would moving that fan to the outside of the tent improve overall venting as I can aim it towards the closet door? I thank you in advance for any advice.
P.P.

 

[Koondense]

A pic of your setup would help.
Some options are:
- switch to 150W hps or
- get more hot air out(bigger fan, filter, duct) and more cold air in
- get a portable AC unit(will help of course)
- ...

The evaporative cooler rises rh so it may be a problem in flowering time with fat buds, you generally want to keep rh low.

 

[PersonalProvide]

Thank you, Loon dense. I'm trying to avoid an AC unit. Hoping that since I live in N.E. United States that the coming winter will naturally help with the temperature. After moving fans around I was able to get temp to 81 but still need it to drop a few more. Here is what my setup looks now. Hope the pictures come through.

 

[PersonalProvide]

https://imgur.com/a/eV3hO

 

[PersonalProvide]

Koondense. Auto correct. No disrespect meant.