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Old 03-01-2006, 02:47 PM   #1
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metal halide XM bulbs?

Anyone use these bulbs yet? any comments on them?
TIA
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Old 03-01-2006, 02:58 PM   #2
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Yeah I have used XM bulbs with no problem. I prefer both XM and Coralvue. Either bulb is a great bulb to have.
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Old 03-01-2006, 03:11 PM   #3
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what is your opinion on the light intensity between the 2? do the xm's burn brighter? Do they last longer like they advertise. Do they run hotter?
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Old 03-01-2006, 04:31 PM   #4
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I think that the Coralvue is a brighter bulb as far as light level and intensity. But this is a very subjective opinion. I don't have any "hard data" to back this up and someone could easily say that the XM is infact the brighter bulb. Again, I think both are excellent bulbs and you will be happy with either pick. The XM's are typically cheaper so that makes them even more attractive.

Both run around the same temperature so that makes no difference.
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Old 03-01-2006, 04:58 PM   #5
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cool beans!
Thanx
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Old 03-03-2006, 10:41 PM   #6
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The XM 10k's are extremely high in PAR(Photosynthetically Available Radiation). Even when compared to more expensive, better lamps. The 15k XM's tend to be very weak, even weaker than their 20k version for some reason. These links should be helpful- http://metricksystem.com/chris/250wcolour/
http://www.cnidarianreef.com/lamps.cfm
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Old 03-03-2006, 11:24 PM   #7
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So more PAR is better?
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Old 03-06-2006, 08:36 PM   #8
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It depends on what type of coral your keeping or plan on keeping. High light corals and clams will generally appreciate more PAR assuming they are properly acclimated to it. FWIW if your running 250's a PAR of atleast 300 is considered decent. HTH
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Old 03-07-2006, 10:43 AM   #9
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okay thanx
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Old 03-07-2006, 09:25 PM   #10
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I have a single 175w 10k XM metal halide bulb and 40 watts of actinic over my 37g LPS reef and my corals split like crazy, I have a bubble tip anemone that is getting huge as well.
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