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Old 04/22/2015, 01:57 PM   #101
Swope2bc
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LOL we submitted our posts at the exact same time.

Basically that means we win! :-).


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Old 04/23/2015, 09:00 AM   #102
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I know I'm late to the party, but I'm looking to light the Nuvo 40 gallon, and I had been recommended the D2120 but wanted to know if these were better.
Since this thread only has the PAR values for MarsAqua, before purchasing look for Bridgelux LED PAR vlues somewhere, I think those were also very good since ReefBreeders is suing them.... But for 40 gallons you probably need the 300W long unit since 2x 165W will be 3"-4" outside your tank walls after hanging them? ...you have to take into account the distance the units have to be placed from each other and you definitely need two of them if opting out for 165W.
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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Old 04/23/2015, 09:52 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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Old 04/23/2015, 11:28 AM   #104
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Originally Posted by paullondon View Post
Since this thread only has the PAR values for MarsAqua, before purchasing look for Bridgelux LED PAR vlues somewhere, I think those were also very good since ReefBreeders is suing them.... But for 40 gallons you probably need the 300W long unit since 2x 165W will be 3"-4" outside your tank walls after hanging them? ...you have to take into account the distance the units have to be placed from each other and you definitely need two of them if opting out for 165W.

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.

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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Old 04/23/2015, 01:31 PM   #105
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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
You are absolutely right. Chlorophyll A is 400nm-450nm and 650nm-700nm.
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...

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Originally Posted by Swope2bc View Post
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:
I see... it's the 24x20x19... In that case even if one 165W would be enough I would go for two of them just so he can make a square, right? He doesn't need a bar, he needs a sort of square light on top of that tank... and the 165W is 15.7"x8.3"x2.36" so two of them will nicely form a 15.7"x16.6"x2.36" which I believe is perfect.... now it depends how he wants the rockwork and all...
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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Old 04/23/2015, 01:48 PM   #106
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Yes, the square would be perfect!!


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Old 04/23/2015, 07:14 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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Old 04/23/2015, 07:35 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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Old 04/23/2015, 07:56 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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Old 04/23/2015, 09:50 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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Old 04/25/2015, 07:09 PM   #111
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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...
I honestly have no experience with current-usa but that was my 1st option I was looking into and many people told me how great they are but not for SPS. I loved the customization and that lightning effect, but many told me they are not using it... just you know for a week until novelty wears off...
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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Old 04/25/2015, 11:06 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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Old 04/26/2015, 12:50 AM   #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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Old 04/26/2015, 05:09 PM   #114
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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?
They are not quiet but not annoyingly loud Three fans are running on the 300 Watt model. I ordered three 80mm quiet case fans from Amazon for 7$ each to swap the old fans and now the led fixtures is stealth quiet


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Old 04/26/2015, 05:18 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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Old 04/26/2015, 06:08 PM   #116
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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.

Do you have corals in your dt?


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Old 04/26/2015, 09:38 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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Old 04/26/2015, 10:11 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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Old 04/26/2015, 10:42 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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Old 04/27/2015, 09:38 AM   #120
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That is the same fixture that has been mentioned in earlier posts, just a different reseller.

It is? I just looked through them and couldn't find it. It has 90 degree lenses as well.


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Old 04/27/2015, 10:14 AM   #121
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It is? I just looked through them and couldn't find it. It has 90 degree lenses as well.

Yes, the marsaqua fixture is identical and has 90 lenses. Basically it's mass produced in China and then relabeled for sale here... Different resellers same product


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Old 04/27/2015, 10:30 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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Old 04/27/2015, 03:39 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.


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Old 04/27/2015, 05:52 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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Old 04/27/2015, 09:06 PM   #125
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They are not quiet but not annoyingly loud Three fans are running on the 300 Watt model. I ordered three 80mm quiet case fans from Amazon for 7$ each to swap the old fans and now the led fixtures is stealth quiet
cthetoy, pardon my stupidity, but is swapping out fans on the marsaqua tough? Any special skills or tricks? I'm surprised at how loud they are although mine are usually only at like 30%. Thanks!


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