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Old 12-03-2006, 04:09 PM
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Anybody heard or know anything about mercury vapor lights? They seemt o be cheaper than mh or hps, I'm wondering if they produce the correct spectrum of light for growth?
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Old 12-03-2006, 04:12 PM
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From what I understand is that they have a red spectrum, but nothing like an HPS. Also from what I understand, they take forever to turn on and heat up.
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Old 02-13-2007, 11:36 PM
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I would recommend just getting hte hps

have a read of this
http://jeb.biologists.org/cgi/reprint/5/2/138.pdf
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Old 06-26-2009, 04:53 AM
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no mercury vapors dont work andf they produce a greenish blue light i looked at a graph of abailable lighting and i dont think you can even keep a plant alive with one let alopen grow a plant with one don twaste your time
 

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