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Old 04/30/2006, 05:41 PM   #1
jjmcat
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4000k hallide

Is it possible to use a phillips 4000k hallide bulb with 4 uri super actinic bulbs with no ill effects. The bulb are new and they were free to me.Will the coral grow or will the 4000k damage the coral in anyway.Right now with all the above bulbs in it looks about like 14k.So looks arent the question.


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Old 04/30/2006, 06:56 PM   #2
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try it


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Old 04/30/2006, 09:36 PM   #3
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bump


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Old 05/01/2006, 09:40 AM   #4
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bump


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Old 05/01/2006, 12:17 PM   #5
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Can i use these bulbs?


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Old 05/01/2006, 12:22 PM   #6
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The kelvin may be too low @ 4k but I'm not positive on that. I know that arguably the best bulb for growth are the 6500k Iwasaki's but they are too yellow for most of us. You need to try and find a kelvin chart that shows what color temp is needed for photosynthesis and go from there. JMO of course


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Old 05/01/2006, 01:56 PM   #7
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You actually want to see the spectrum chart. If the spectrum is close to sun's it should be good. If it has a giant green or yellow spike, then it's bad.


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Old 05/01/2006, 01:58 PM   #8
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Quote:
Originally posted by pavster
You actually want to see the spectrum chart. If the spectrum is close to sun's it should be good. If it has a giant green or yellow spike, then it's bad.
That's what was trying to think of..."spectrum". I couldn't think of that word to save my life. Thanks!


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Old 05/01/2006, 04:07 PM   #9
jjmcat
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anyone know a good websit for that info.


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Old 05/01/2006, 04:16 PM   #10
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The problem is the less popular the bulb, the less info you will find on it. The manufacturer might have some data, but you never know whether it's honest and correct without independent verification.

On the other hand, if you like the looks, and it seems bright, you might as well stick with it. No MH setup is perfect, so who is to say that your setup is more imperfect than some other more traditional setup.

-pavel


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