Cooling My Area Down

I just invested a little bit of money and installed the cooling kit to my reflector for my 315w cmh, which seemed to have helped a couple of degrees in difference, however, I am still not where I need to be temperature wise. I tried arranging my setup in every possible way and I can only get my 4'x4'x6' room to 85-90 degrees (even with the cooling kit installed). In addition to the cooling kit, I made sure there was enough air exchange in the room having 150-200 CFM's in and 340 CFM's out, plus a box fan, a small clip on fan, and an osculating fan directly under the light pointed onto the thermometer.

At the moment I am only running a small mars led panel for a single lady, simply because I cannot keep the temps low enough with the 315w bulb turned on. I would like to get my numbers back up to get on rotation (another 3 months behind), however besides running an a/c unit (which is not really an option unless it's cheap and on a super small scale) I am not sure what there is left to do. I've already invested $70 in trying to fix my heat issues, figure at about another $90 I could have just got another junk led panel for the summer.

Thoughts?

I just spent a couple more hours trying to figure out a solution.. nothing is coming to mind.

If you have access to water, and water is cheaper for you than electric, you can make a water heat exchanger, tiny one. it's basically a small squirel cage fan, pushing through a small car like radiator, we're talking like 16" by 10", and cold water from the tap just runs up and into the rad and back out to the drain, while fan pushes air through, waste's water but if you dont care, and water cheaper than electric for you, it's good shit for small room, and you hook up thermostat with switch to turn it on and off as needed so it doesn't run non stop, also has 3 speed fan, hard wire whichever you need. Can take a pic of the one I built to see if that's even an option for you, but in the end, it's still gonna cost about the same as a small 5000btu window ac, and running around to ge the parts. just idea.

Can you draw a diagram of your set up showing fans, thermometer, where the extraction is and goes to? Or take a pic or worst case describe in detail.
I run a 315 in my veg tent which is 4x4 but is a loft shape so only 4.5ft high at sides and 5.5ft high in the middle. My fan is probably around the same size as yours and right now we are having a heat wave but still only hitting 80degree f

Are you discharging hot air outside ?Try to control temp of air being drawn in.

In other words my 5 X 6 grow area is a partitioned room in the corner of a 14 X 20 basement (poured concrete walls, stays cool)

Controlling the temp of the overall basement goes a long way toward regulating thee grow room within.

Hope that makes sense.

Since I meantioned it, here's the heat exchanger setup I was talkin about in my thread:
http://rollitup.org/t/katsu-bubba-bagseed-organic-grow-show.943303/#post-13611258