YAh zcomp i think your right about the cfl's. I have the hose hooked up to the bathroom fan. it has a nice 4inch exhaust port that fits perfectly on the hose. I then lay the hose length wise infront of my seedlings as shown. Im going to switch my seedlings over to the HPS here in afew days. If i hook the hose right up to the HPS hood i can cool the bulb directly which I hope will lower the temps in my wardrobe.I will loose the direct cooling on the plants though, which can strengthen the stocks of the plants, but the temps are probably more important.