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  1. 12-05-2009 04:20 PM #1
    ryfpballa
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    Default help fast! too much heat? 400w hps light

    Ok so I have two plants growing in an aerogarden, ihave used the aerogarden light during my whole grow for the 1st 6 weeks and then recently got a 400w hps light. i set the light up 6 inches away and they burnt the top of the plant. i moved the light up a foot and now the leaves are green crumbly and curling. please help!
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  2. 12-05-2009 04:42 PM #2
    Dirtyboy
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    raise the light
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  3. 12-05-2009 04:43 PM #3
    Sealion
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    Yeah dude, move it at least 2ft above the plant immediately. You really need to read before applying.
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  4. 12-05-2009 04:49 PM #4
    KayAnow
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    hmmm....i dunno what sized space ur in or what kinda ventilation ya got, but im able to keep my 400 watter a ft away from mine with no probs at all. And i just got a darn fan blowin over the tops of em.........hmmmm but ya sounds like to needa continue to raise it a bit. But further explain where the leaves r getting crumbly at......is it just the places that got burnt that r doin that or everywhere?
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  5. 12-05-2009 04:54 PM #5
    stumps
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    put your hand under the light and move it untill you don't burn your hand that how far away your light should be. 12-18 inch's
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  6. 12-06-2009 04:06 PM #6
    ryfpballa
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    Quote Originally Posted by Sealion View Post
    Yeah dude, move it at least 2ft above the plant immediately. You really need to read before applying.
    more often then not i read people stretching there plants because the light is to far away.

    I have two large fans in there and my hps light is air cooled. So i was suprised heat was a problem. I just hope they can overcome the stress.
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  7. 12-06-2009 04:10 PM #7
    doc111
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    Quote Originally Posted by ryfpballa View Post
    more often then not i read people stretching there plants because the light is to far away.

    I have two large fans in there and my hps light is air cooled. So i was suprised heat was a problem. I just hope they can overcome the stress.
    I've had my aircooled 1000w hps less than a foot away from the tops with no burning. Strange............
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  8. 12-06-2009 04:28 PM #8
    bigwheel
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    I think you cooked their goose pretty good. I would not dare start a baby pant within 6 feet of a 400 HPS. Move em up or the light down real gradually. Prob be a good plan to flush em and start over. Chalk it up to experience. Hopefully you was not using some rich folks seed
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  9. 12-06-2009 09:29 PM #9
    potberto
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    I've grown from seed under a 400w hps.. Granted it's not right under it, but a couple feet worked well. Kept the plant nice and bushy.

    Also, my 400w has no problem being 6-8" off the canopy. It doesn't get THAT hot..
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