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Old 08-03-2008, 04:41 PM   #11
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I just realized that fixture came with the 20k bulbs. I believe the 20K bulbs have a much lower PAR rating than the 10k bulbs do. Not sure how much of a concern that might be, but it might be for clams on the bottom. Maybe time to buy a meter too and test a few different bulbs. For a frag tank I would think that 6,700k or 10,000k would be the way to go for growth.
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Old 08-03-2008, 07:09 PM   #12
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Nuts! Anyone wanna trade a couple of 20k bulbs for some 10k??? LOL
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Old 08-03-2008, 07:44 PM   #13
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I just realized that fixture came with the 20k bulbs. I believe the 20K bulbs have a much lower PAR rating than the 10k bulbs do. Not sure how much of a concern that might be, but it might be for clams on the bottom. Maybe time to buy a meter too and test a few different bulbs. For a frag tank I would think that 6,700k or 10,000k would be the way to go for growth.
You'd lose all the color in your frags with 6700K bulbs.

If you want to maximize growth then color, then grow with 6700K bulbs then color them up with a nice 20K bulb.

Otherwise, I'd stick to a 14K bulb for a mix of growth & color. The Phoenix bulbs are a nice choice IMO.
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Old 08-03-2008, 09:07 PM   #14
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67k would be nice if you use some actinics with it. I personally like the looks of 14k.
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Old 08-04-2008, 08:45 PM   #15
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so you gonna sell me some frags in the future
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Old 08-04-2008, 09:33 PM   #16
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so you gonna sell me some frags in the future
Yup, I think I kinda owe you for that awesome rbta, leather & buttons that you sent me.
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Old 08-05-2008, 02:03 AM   #17
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Can't you just keep half of the 20k bulbs and then replace the other half with the 6700k or 10,000k?? Then when you need to change your bulbs you can use the 20k bulbs that you took out and just replace the 10k bulbs. I think the combination of the 20k and the 10k/6700k would look nice. Actually I think it would then be your typical 50/50
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Old 08-05-2008, 03:13 PM   #18
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It's a 2 bulb MH fixture. For a frag tank I would think you want to mazimize growth, and 6700k does that. To color up before selling you want to get them under 14k or the 20k bulbs. As stated a 14k bulb should give you a good combination of growth and color. If comes with 20k bulbs so use them for 6 months and then decide if you want to switch out to 14k or lower.
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Old 08-05-2008, 04:23 PM   #19
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I'm going to go with the 14k bulbs. I think it would be the easiest solution. Thanks cmor!
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Old 08-05-2008, 07:30 PM   #20
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If you use a 67k or 10k bulb with one or two actinics will it be about the same as a 14k bulb?
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