Quote Originally Posted by Opie Yutts
Can you vent into the crawlspace or attic? You really need to get that hot air out of there, or consider flourescent lights.

Or try this: get a fan that is dedicated to blowing the space between your light and plants, and get a big ice block, set it in a big bowl and put it in front of the fan. Or just set a couple of ice blocks near your plants. They may last all day that way and decrease temps a few degrees. I've recently thought about trying something like this. I'll let you know how it works if I come up with something.
Like similar to a swamp cooler? That probably would lower temps. If you try this I would like to see. I'm also curious as to what effect this would have on humidity. Without proper exhaust I don't think that water vapor will be going anywhere. Be careful for mold/mildew, I know that can be an issue with swamp coolers sometimes. If you try it, keep us updated please .

WeedyBoyWonder: Can you post any pics of your closet. Sometimes it's easier to figure out a solution if you can see what you're working with. Also, how stealthy does this need to be?
AR15 Reviewed by AR15 on . Reducing Closet Temperature We have 2 plants going in a closet under a 400w HPS. They are currently 4 days into flower, and were grown outdoors in the vegetative stage. There is mylar on each side of the walls, and a fan blowing from the floor up on to the plants. The temperate on the thermometer is at 100d F, give or take a small amount. I would like to reduce the temperate to about 85d F, but I cant put holes in any walls ruling out using an extractor or something like that. I have the cupboard door open about half Rating: 5