Evaporative cooling

Wouldn't a bucket of water sitting under the light cool the room slightly due to evaporative cooling?

I need humidity up and temp down, this seems to be a easy solution...?

I thought I had my temp issues resolved, but overnight the room did get back up to 85 with the door closed for 8hrs.

THe cooling efect would be negligable. In order to get any measurable cooling effect you would need to inject water vapor/mist. The tiny droplets in the vapor evaporate much easier.

To get a cooling effect, you could put an air stone in the bucket. The bubbles popping will put extra moisture in the air. Like the poster above said, the cooling effect would probably still be negligible.

Just a few thoughts on your temps: 85 isn't that high. Personally, I wouldn't buy an AC for the few degrees you need to drop. Also, make sure your temp is really 85. The heat radiating from your light can raise the temperature of your probe. Make sure your probe is shaded to get the proper ambient temperature in your room. Finally, you can expect a rise in humidity when your plants are growing. Their transpiration and the evaporation of the water you give them will increase the humidity of a small area.

Good luck to you.

A bucket of water under your light? not a good idea. electrocution, fire, bulb explosion hazard...

I broke down and ordered a cool tube. How much will it reduce my temps if my current maximum is 85?

I have 4" everything, but cool tubes only come in 6" and up. I ordered 2 6 to 4 reducers, it should still make it a lot better right? I am using a duct blower. I plan to go can filter > cooltube > blower > exhaust.

I'm guessing it'll make a 5degrees difference at least, does that sound right?

what kinda of fan is it? If its a duct booster, it wont have enough ass to pull through a filter.

No it's an 180cfm 4" "blower" not a booster fan. Was the growbright blower/can combo thingy

Also got insulated ducting, heard it'll reduce noise better but was mainly bought to retain the hot air in it.