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Old 11-15-2007, 12:47 PM
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Default Just Breaking The Soil, Question on Light Distance!
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Hey everyone, I finally planted some bag seed I've had for a few months under a 400watt HPS. I was wondering how far away my light should be since they're just breaking soil and I don't want to fry them. Thanks in advance guys
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Old 11-15-2007, 12:49 PM
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Well I know with CFLs, when they're young you're supposed to keep the light about 3-4 inches away until it's a few weeks in, then you can lower it to around 1-1.5 inches

Not sure about HPS, I know those are more powerful and emit more light. I'm thinking maybe 6" is enough space? You don't wanna burn or kill your little sprout!
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Old 11-15-2007, 12:53 PM
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12-18". If its too hot for your hand its too hot for the plant. If you have a vented light hood then you can get even closer.
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Old 11-15-2007, 12:57 PM
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Quote:
Originally Posted by jomal206 View Post
Well I know with CFLs, when they're young you're supposed to keep the light about 3-4 inches away until it's a few weeks in, then you can lower it to around 1-1.5 inches

Not sure about HPS, I know those are more powerful and emit more light. I'm thinking maybe 6" is enough space? You don't wanna burn or kill your little sprout!
god no !!!!!!!!!!!!! please dont listen to this. i know your trying to help but wrong info will not help.

keep the light 24-30" away or use fluor tubes for the first week or two. hope you have pleanty of ventilation for the hps and fan to help the sprouts stay strong.

thanks widow....then after the first two weeks you can move the light closer 12-18"
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Old 11-15-2007, 01:00 PM
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Yea notice the ? at the end of my sentence I wasn't quite sure if that was enough or not I've never done anything with HPS

Didn't mean to offend you LOL
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Old 11-15-2007, 01:18 PM
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Oh man, thanks for such quick responses guys!

Big Mike, I do have an oscillating fan in there to keep them strong and Widow, its not too hot for my hand.

Jomal its all good dude, its not exactly possible to offend someone as you give them advice to help a situation As for the tubes/cfls, I'd love to buy them for this wonderful time but I'm tight on cash since I got fired from my job not long ago

Thanks again everyone!
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Old 11-15-2007, 01:28 PM
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i really need to know how far my 1000w shoud be from 3wk old babies.
10 inches tall, ten inches wide. apreciate all the advice
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Old 11-15-2007, 02:12 PM
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i really need to know how far my 1000w shoud be from 3wk old babies.
10 inches tall, ten inches wide. apreciate all the advice
I wish I could help you out, but I'm not sure. Anyone want to help this dude out?
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Old 11-15-2007, 02:15 PM
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I'm using a 400w MH right now for vegging and it's about 24" away, barely far enough to keep the tops out of danger. I'll have to raise it for the weekend (going out of town) or they'll probably be burnt Monday morning. They are growing about an inch a day.
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Old 11-15-2007, 03:54 PM
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I have a 400 watt MH/HPS i keep the light 24" above the seedlings, on my 2nd grow because i killed the 1st by having the light 6" above. So the guy that said 24 to 30" is more the case than 6".
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