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Reload this Page Can I use a 400W HPS Bulb during Vegging a Flowering?
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Old 08-30-2008, 09:08 PM
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Default Can I use a 400W HPS Bulb during Vegging a Flowering?
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The title says it all.
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Old 08-30-2008, 09:12 PM
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Sure you can!!
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Old 08-30-2008, 09:18 PM
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Yes you can but it will cause stretching and internoding so I would try to get some of the blue end of the spectrum in their with some CFL's 2700k-3500K. But to answer your question you can for sure just make sure if they are clones or seedlings you have them a good 3 1/2 to 4 feet from the light.
I am a novice but from all the reading I have been doing I am pretty sure what I said is right.
Please people correct me if I am wrong.

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Old 08-30-2008, 10:54 PM
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Am I better off using two 100W CFL's during Vegging, Maybe the first three weeks?.
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Old 08-31-2008, 01:39 AM
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I would say yes if they are the right spectrum. You are looking for the ones that put off more of a blue light than an orange.
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Old 08-31-2008, 01:42 AM
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I would say that a 400W HPS is much more beneficial than using 2 100W CFLs in the vegetative growth cycle.
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Old 08-31-2008, 01:43 AM
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**** From my previous post the first one. 2700K-3500K is not what you want. Sorry You want the higher 6500K they are the blue spectrum and most of the time called Daylight on the package. Again I am sorry but I just checked and this is the right info
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Old 08-31-2008, 01:47 AM
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whulkamania......

I would wait for more info because like I said I am a novice and from looking at GrowTech's Journal he knows more than me. Just trying to put in what I have read.

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Old 08-31-2008, 01:58 AM
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You are in a better situation than me. I have a 400 MH I have to use for flowering. CFL is the way to go to veg, depending on how many plants you are growing---you can also use the 4' shoplights. I am vegging under two shoplights and will flower under the 400MH. If you veg under CFL and then put them under the HPS to flower they will EXPLODE!!!!
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Old 08-31-2008, 02:01 AM
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Originally Posted by caddyluck View Post
You are in a better situation than me. I have a 400 MH I have to use for flowering. CFL is the way to go to veg, depending on how many plants you are growing---you can also use the 4' shoplights. I am vegging under two shoplights and will flower under the 400MH. If you veg under CFL and then put them under the HPS to flower they will EXPLODE!!!!

I find that MH is the best to veg under... Why would you not complete the entire cycle with the MH? MH is excellent for vegging, and it is said that the light from an MH produces more resin during flowering which is not really a bad thing.
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400w, bulb, flowering, hps, vegging

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