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  #1    
Old 09-20-2007, 03:18 PM
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Default hps heat issues
so i just started my seedlings under cfls. they are big bang by greenhouse. i have a 400w hps with a metal halide conversion bulb. i dont want to fry the lil babies so im waiting till they get a little stronger until i turn on the 400 watter. this is my first grow with a hps and i am wondering if a fan blowing on the light and one blowing on the ballast will be enough to keep the heat to a point where the plants can survive. Also how high above the tops should the light be. any advice would be appreciated
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Old 09-20-2007, 05:05 PM
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Default heres a chart~
works for me someone gave me the link so here ya go~http://www.icmag.com/gallery/data/50...ight-Chart.jpg
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Old 09-20-2007, 05:19 PM
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first off ,where are you growin,,closet book shelf,,pc ,,depends on the space you have em in,,as too what you need,,I grow in a small closet,,temps can easily reach over a 100 in the summer,,unless you have air flow in,,and out,,and air movement inside,,I started with a 400 watt hps,,had high temps,,learned about ventilation here,,upgraded to a 600 watt,,and temps are lower,,so what's up??

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Old 09-20-2007, 07:52 PM
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im growing in a small closet aproxamately 3'x3' and i have the door open as much as possible i am only going to be living here for a little longer so i cant cut any holes for duct
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Old 09-20-2007, 08:04 PM
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you need a fan at least blowin air in the open door,,it will get stale and humid otherwise

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Old 09-21-2007, 05:35 PM
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say i cant open the door for a day or two is there any type of cooling system that i could use. i cant run any duct or anything. is there like an a/c unit or something that can help keep it cool enough they wont die
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Old 09-21-2007, 05:40 PM
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Thats a tight aare and if you cant modify it heat wil be an issue.A portable ac unit can be bought but that would take most the space in there and cost about $40 at the cheap end
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Old 09-22-2007, 09:29 AM
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i mean the other side of the closet has clothes in it so i could probally get a unit on that side. do you think maybe i should just grow with cfls again.
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Old 09-22-2007, 09:32 AM
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Can you look into getting a cover for the light that has a built in cooling fan?
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Old 09-22-2007, 10:52 AM
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you arent growing in your parents house and trying to hide it from them or some crap like that are you?
 

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