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04/22/2015, 12:57 PM | #101 |
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04/23/2015, 08:00 AM | #102 | |
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The wattage is OK and you should not take that into account for LED so much, it was used as a guide line for tubes back in the day and since you have the PAR values for LEDs that is a bit more helpful. I was also looking at recent studies about LEDs and people going for 420nm vioets, that seems to be a non necessary wavelength for corals photosynthesis. |
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04/23/2015, 08:52 AM | #103 |
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That's not entirely true about 420 nm violets. The chlorophyll a, which is the dominant variety in most corals, has a primary absorption peak at 417 nanometers. Pretty dang close to 420nm. Chlorophyll b has a primary absorption peak at 436 nanometers. About halfway from 420 nm violet and 450 nm royal blue. Violet is very beneficial
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04/23/2015, 10:28 AM | #104 | |
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Did you look at the dimensions of the tank he will have? I believe it is only 24" wide, would the 300w be too wide at 32"? One 165w would fit but have to be run a little higher power. I may be totally off here, just an observation: |
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04/23/2015, 12:31 PM | #105 | ||
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Chlorophyll B is 450nm-500nm and 600nm-650nm. There is no doubt about this. I was just mentioning that later studies are focused on the higher limit of the wave length as getting a better growth response. A very debatable subject and like everything new I would just keep an eye on it... Quote:
About the higher power... the guy sent me the difference and I have no clue where I put the e-mail, if you drive those LED at maximum power you burn them quickly and your PAR values are not going to make a huge lot of a difference, my 300W unit runs t 240W, so I will not sweat over those 60W when what I get is WAY over the light amount you need... Hope this helps.... |
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04/23/2015, 12:48 PM | #106 |
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Yes, the square would be perfect!!
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04/23/2015, 06:14 PM | #107 |
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Went looking through eBay and there are so many options for these and they all look identical. I want to get 2 of the 165 w units and I'm just curious if they are all the same thing, because they appear to be. I want to send my husband the link so he knows what I want for my birthday, but I want to send him the right one and I just can't figure out the difference between them
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04/23/2015, 06:35 PM | #108 |
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They are basically the same unit rebranded, however MarsAquatic has gotten a pretty good name for itself for having better customer service. However, I have no personal experience with them it is just what I've read here on RC
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04/23/2015, 06:56 PM | #109 |
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Yeah the customer service and warranty will vary from seller to seller. They're all originally manufactured by evergrow. All same housing, drivers, and either epistar or bridgelux diodes. The 3 headed giant retailers in the U.S. Are Reef Breeders, Ocean Revive, and Reef Radiance. They're selling the same units as the eBay ones but offer better customization, warranty, and service after the sale. Pick your poison. The units containing bridgelux diodes, and ones that contain 420 mm violets as well as several shades of white would be preferable. But your results will be similar with any of them really
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04/23/2015, 08:50 PM | #110 |
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Anyone have experience with current usa and their reef units? The customization for the price seems sweet, and reviews I read claim they can grow pretty close to everything but they are much lower wattage...
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04/25/2015, 06:09 PM | #111 | |
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The wattage is different because the diodes are different and this is the tricky part with LEDs. Don't look at the wattage, look at the PAR values they put out. Hahahaa more research for you to do. I'm glad I'm done with it I love the MarsAqua... in such a short time I have such a nice growth and everyone is happy in the tank. |
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04/25/2015, 10:06 PM | #112 |
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I'm not dead set on the Mars unit just yet, so I guess more research lol.. I love the Mars unit if I can customize it to run on my apex, I'm just not confident in the content I've seen on that yet. That being said, if the current will not grow SPS then I'm not sure it's for me anyway...
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04/25/2015, 11:50 PM | #113 |
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How are the fan noise levels on these Mars Aqua lights? Are they turned on when the lights go on, and are they loud?
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04/26/2015, 04:09 PM | #114 | |
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04/26/2015, 04:18 PM | #115 |
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I have a 90 mixed and run the 300 on the DT and a 165 over the R-300 Refugium growing Macro like crazy. Clean up crew keeps the algae at a minimum along with my Starry Blennie and Powder Brown. Mexican Turbos in the refugium keeps the micro under control. great lights to start off with! No problems yet here after 4 months.
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04/26/2015, 05:08 PM | #116 | |
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Do you have corals in your dt? |
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04/26/2015, 08:38 PM | #117 |
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This is the one that I am looking at. Let me know if you think I should choose a different model. I like it because it has some violet spectrum as well. http://pages.ebay.com/link/?nav=item...d=281553749262
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04/26/2015, 09:11 PM | #118 |
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That is the same fixture that has been mentioned in earlier posts, just a different reseller.
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04/26/2015, 09:42 PM | #119 |
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Does anyone know what to do if a large GBTA is on top of a very small RBTA ? First time using a form on taptalk so I apologize.
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04/27/2015, 08:38 AM | #120 |
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04/27/2015, 09:14 AM | #121 |
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04/27/2015, 09:30 AM | #122 |
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The Mars Aqua ones that I found have 120 lenses and do not have any violet spectrum. Do I need to violet spectrum?
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04/27/2015, 02:39 PM | #123 |
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Mars Aqua mentioned in first page of thread
Dimmer One(28 LEDs): 8 x Cool White 12,000k, 6 x Neutral White 7500k, 6 x Warm White 3500k, 2 x Red 660nm, 2 x Green 520nm, 4 x Blue 460nm Dimmer Two(27 LEDs): 7 x Royal Blue 450nm, 20 x Blue 460nm Your light: Dimmer One(28 LEDs): Warm White(3500-4500K), Neutral White(6500-7500K), Cool White(10000-14000K), Green 520nm, Deep Red 660nm, UV (400-420nm): Dimmer Two(27 LEDs): Blue 460nm, Royal Blue 450nm. I do see the UV's listed in the fixture you found. I could not honestly tell if you need them or not. Some people have said yes, others say that modern studies show them unnecessary... So it really depends on who you ask. This makes the units slightly different but still basically the same build. In regards to the lenses 120° will be better for my personal usage because my tank is not deep and it will provide better spread and uniformity of the light pattern. The basic answer is that the light your looking at will work just fine for an entry level no frills LED fixture. |
04/27/2015, 04:52 PM | #124 |
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The inclusion of those narrow band reds draws more attention than the violets. Violet is not present in any amount on white or blue diodes, hence the importance of adding dedicated narrow band violets. Red however is very present (they're loaded with it) on all those warm whites. I'd put black electrical tape over, or even swap out those red diodes entirely were it me. Warm whites provide more than enough red spectrum for visual appeal and par
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04/27/2015, 08:06 PM | #125 | |
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