Couple Questions Regarding Humidifier and how it effects temps....

My current setup is in my closet located in a spare room which gets hit with the sun throughout the day. When window is cracked and room cools my temps get down to about 66 at night with lights off in the closet (4'x2'x8'). During the day the temps rise and the room temp rises (lights on). I go from about 75 in the morning and by 3pm my closet hits about 80. Humidity in that room varies from 20% up to 48% but I average around 38% during lights on. I never worried about humidity in the past and usually take the hottest months off in the summer. I am running a 400W Sun System 2 with HPL and have the glass in, air cooling hood with inline fan (4" 160 CFM) and ducted to attack. Basically having air filter ducted to hood then hood ducted to ceiling into attack. I get good negative pressure and no intake just letting the air pull from room.

I am just starting my 12 / 12 cycle and decided to add some supplemental CFL lighting toward the bases of my plants for additional lower lighting. I added 3 CFL lights think they are 30 or 36 watts per and noticed my temps jump up about 3-5 degrees since I did that. So not I am more in that 80 to 85 range. I typically haven't added supplemental CFL lighting in the past but wanted to see if it made a difference this time around. I was reading how adding a humidifier will lower the temps and was thinking this may be a good way to offset the additional heat and bring in some additional humidity in the room. I am not trying to get it above 50% just more toward that 45% mark to see if it helps. I went out and bought a $30.00 humidifier at CVS, small portable one that you basically plug a 20 oz water bottle into it and it shoots out steam.

Have it in my closet and not sure where to position it....I stuck it on the side in front of the fan blowing towards plants (have two 6" clip fans blowing in opposite directions to move air). I see the steam vapor moving with the fans but then is headed up toward filter (assuming it is the vacuum) before it reaches the plants. I tried moving more toward the center and it seems to reach the plants better. Anyway either way I am only seeing my humidity go up from 38% to 40% all the way turned up? Temp may have dropped a degree or so? Maybe the humidifier I bought is not big enough for this space or I am just expecting to much here?

I have a 4x2x5 and I'm running a 400w with reflector. I bought a humidifier from walmart for 26 dollars. It holds about a gallon of water and it doesn't really help my room that much. I to was excepting more from it. I shut it off the other day and the humidity barely changed.

I guess that is what I was wondering....With a small portable humidifier can you really change your environment that much. I do say it is interesting to watch the correlation as I did notice the temp drop slightly I am about 41% and 80 degrees right now. Maybe it is just going to take some time for it to work. I see as the temp is rising in this room the humidity is going up slightly more in the closet and the temps are pretty stable at 80 where the last few days they started to climb up....I actually pulled the humidifier out of the closet and using the negative air pressure, rigged it to pull in the room that way....Just so I could watch the temps and humidity while I make some adjustments. Seems to be working better than when I had it in the closet? Hmmm...

Run your lights at night for cooler temps. My humidifier works fine in my closet. Boosts my rh anywhere from 20% to 60%. It also helps run my closet about 5 degrees cooler

Thanks, I was thinking about running my lights at night and dark during the day....but was wondering if it would be better to have temps like 80 during the day and 65-70 at night. I hear it is good for the plants to have a drop at night. I am afraid if I run lights at night and dark during day I am going to end up with a constant 75 throughout both cycles. Also since this is a spare room that gets lots of light during the day I would have to worry a little more about penetrating light where as at night I am locked in with total darkness that was my logic anyway. In the summer it would be a must though unless I have the AC pumping. I will have to test this out next grow (summertime) and see if it makes a difference. I have never worried about any of this before and had very successful grows. Guess I just wanted to fine tune everything and see if it really makes a difference.