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But the old saying is, put your hand under the bulb, if it starts to burn its to low, I put my hand there for a good minute and it was as cool as it was before my hand being under the light, but give me about 5 min and I will see how it reads 6 inches higher.

My thermometer is on sitting on the buckets, just not in the picture. I felt like putting it there would be a good indication of how hot it gets on my plants, but I put my hand where the therm is and it feels cool as hell, almost like it is fucked up. Its a little cheapo from Menards, I need to...

I pull it from the room, to the hood and then to my exhaust fan out the roof.

Just a passive intake at the bottom door. about 2 inches high. the Ambient temperature outside the grow room is 65-70

I've gotten all my help from Rollitup to pull of a grow in another room until the wife wanted more space for shoes. So I downsized closets and have a 2x3x8 grow room with a 400w air cooled hood, 200 cfm 4 inch vortex, proper ducting and breeze, but when I tested my temps it was staying at 90...

Well, I got a 600w hps thats 110 in there, think that would be better? If I can drop the temps enough id rather use it

Yeah I know the MH bulbs get hotter then the HPS, therefor I'd rather use Hps the entire grow, and plus it gives it a little bit more lumans =). So you think it would drop it a fair bit? Dude at my hydroponic shop said around a 10 degree drop, but that would still be 90 =/.

I just got done with my room, its a 2x3x8 ( 48 cf ). I have a 200 cfm 4 inch exhaust running out of my ceiling and a 400w mh/hps with a bat wing hood. I checked my tempature and it was a scorching 102 degrees after 2 hours. I was wondering if I got a air cooled hood and slapped it on would it...

And yeah I know, it's impressive what 3 weeks will do to your plants, Mine grew to from seed to about a foot in a half in about a month ( indica mind you ). By time it was done the monster was 7 foot tall -_-. LOL

Yeah, except for last harvest! The room I had had a 600w in it and the temps were perfect! and thats with no air cooled hood or exhaust fan. But other then an air cooled hood, nothing else I could do?

I got the fan mounted up to my ceiling, the ambient tempature of the "passive" exhaust is usually 70-75. And yeah an air cooled hood would be tight but from what i;m seeing it will only bring the temps down 5-10 degrees.

As the title says, I just built a new grow room, it is 2x3x8, I did all the calculations and went out and bought a 200 cfm 4 inch vortex exhaust fan. I went and did a test run with no plants and my 400w hps is making that room 102 degrees, I was wondering what I am doing wrong and or what could...

Just what I was looking for =) I appreciate it alot.

I got a 80% indica and 20% sativa cross and was wondering about how far each plant should be spaced outdoors, last year I put bagseed about 1 foot away from each other and there was alot of crowding, but still got 7 oz per plant! Wanting to up the anny this year and hopefully get a pound per...

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Dont know how this got unfilled but here it is. How long has this problem been going on? 1 month Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents) No What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...) Dwc What STRAIN...

Title says it all, Been having this problem for about 3 weeks or so, I know my pH isn't the best but I use my pH down to 5.5 ( With Nutes ) and within an hour it goes back to 7. My old growth starts with little yellow/brown spots like necrosis, later on they begin getting brittle and curling up...