How to value these numbers in aquarium?
This is a good question. At first we thought that we could transport these values to the aquarium tout-court. Than we filled the aquarium, insert the probe and redone the measurements. We fazed but, as we have already said in elsewhere, we’re going to talk about this in another article. Basically, while at 20 cm the result is practically the same, as we progressed, thanks to the glass and the water itself reflecting the light, we found even the double of the values measured in air. Obviously this isn’t a detail that can be standardized, so we think that our method of calculation is the most correct, and the best for the comparison of coverages of different ceiling lights.
Here is an example: these are the PAR values at about 40 cm.
As you see, we should have 470 PAR. And yet, and you can also see it here below, at that distance from the ceiling light, we’re over 600 PAR. And on the bottom on the sides instead oof 116 we are more over 400.
If you click on the video you’ll be directly redirected to the part in which we measure th PAR with the Quantum Meter MQ-510 by Apogee submerged in water. I think it’ll be very instructive.
The comparison with other ceiling lights on the market
Here the data collected in the DaniReef Lab with the Quantum Meter MQ-510 by Apogee. We can do an interesting comparison between the ceiling lights:
|AI Hydra 32 HD at 17 cm||560.000||430||90,50||1.303||6.190|
|AI Hydra 32 HD at 37 cm||563.000||430||90,50||1.310||6.224|
|AI Hydra 32 HD at 57 cm||463.000||430||90,50||1.076||5.112|
|Aqamai LRM at 17 cm||643.000||465||90,88||1.382||7.071|
|Aqamai LRM at 37 cm||722.000||465||90,88||1.552||7.941|
|Aqamai LRM at 57 cm||616.000||465||90,88||1.326||6.783|
|Aqamai LRS at 17 cm||276.000||289||47,59||955||5.797|
|Aqamai LRS at 37 cm||312.000||289||47,59||1.078||6.547|
|Aqamai LRS at 57 cm||254.000||289||47,59||880||5.343|
|ATI Straton at 17 cm||2.018.000||890||211||2.268||9.565|
|ATI Straton at 37 cm||1.410.000||890||211||1.584||6.681|
|ATI Straton at 57 cm||957.000||890||211||1.076||4.537|
|Cetus 2 at 17 cm||410.000||215||60,68||1.906||6.756|
|Cetus 2 at 37 cm||291.000||215||60,68||1.353||4.793|
|Cetus 2 at 57 cm||174.000||215||60,68||807||2.861|
|Ecotech Marine Radion G5 XR30 Blue at 17 cm||1.536.000||949||203||1.618||7.564|
|Ecotech Marine Radion G5 XR30 Blue at 37 cm||1.098.000||949||203||1.157||5.409|
|Ecotech Marine Radion G5 XR30 Blue at 57 cm||648.000||949||203||683||3.192|
|GNC BluRay PRO at 17 cm||1.321.000||1.149||140||1.150||9.437|
|GNC BluRay PRO at 37 cm||874.000||1.149||140||760||6.239|
|GNC BluRay PRO at 57 cm||564.000||1.149||140||491||4.029|
|Orphek iCon at 17 cm||1.469.000||1.350||229||1.177||6.417|
|Orphek iCon at 37 cm||1.286.000||1.350||229||1.030||5.616|
|Orphek iCon at 57 cm||1.156.000||1.350||229||925||5.047|
|Philips CoralCare at 17 cm||1.859.000||749||190,5||2.481||9.756|
|Philips CoralCare at 37 cm||1.341.000||749||190,5||1.790||7.037|
|Philips CoralCare at 57 cm||933.000||749||190,5||1.246||4.899|
|Philips CoralCare Gen2 at 17 cm||1.330.000||749||168,5||1.780||7.914|
|Philips CoralCare Gen2 at 37 cm||920.000||749||168,5||1.229||5.461|
|Philips CoralCare Gen2 at 57 cm||631.000||749||168,5||843||3.745|
|Reef Flare PRO L Blue at 17 cm||1.646.000||940||166||1.752||9.904|
|Reef Flare PRO L Blue at 37 cm||1.338.000||940||166||1.423||8.047|
|Reef Flare PRO L Blue at 57 cm||922.000||940||166||981||5.545|
For what regards the energy produced per euro of purchase the ceiling light is in the low average, but next to some of the best lamps like Orphek iCon and Ecotech Marine Radion XR30 G5. After all, the quality has a price. On the other hand, regarding the developed PAR per watt it reaches a very high value. Only three ceiling lights have ever overcome the value of 9.437 PAR per Watt at 17 cm, and not by far, and one is not even for sale anymore. It has a very high efficiency, very close to Philips CoralCare and ATI Straton. It’s also high the energy produced at every distance, that’s the sign of a great coverage with very high average PAR values. All this data shows that these ciling lights are perfect for aquariums of 60 cm of width, a bit stretched for 70 cm ones. Even if you have to consider that the corals wouldn’t be placed next to the glass.
The GNC BluRay PRO cost 1.150 euro, even if they’re often on sale, so make sure to follow DaniReef so that we will alert you when there are some offers.
The absorbed power is 139,66 watt, so that the cost/watt ratio is about 8,21 euro per watt. For a comparison with the other ceiling lights you can consult the following chart. Notice that they’re sorted by decreasing efficiency, so the best ones are on top.
|Ceiling light||Price||Power consumption||Euro per watt ratio||References|
|Orphek OR2 Blue Plus||180 USD||54.7 w||3,3 euro per watt||DaniReef LAB|
|Orphek OR2 Reef Day Plus||180 USD||54,7 w||3,3 euro per watt||DaniReef LAB|
|Cetus 2||215 €||60,7 w||3,5 euro per watt||DaniReef LAB|
|Philips Coralcare 2019||749 €||190 w||3,9 euro per watt||DaniReef LAB|
|Maxspect Ethereal||500 €||126 w||4,0 euro per watt||Italian test|
|ATI Straton||890 €||211 w||4,22 euro per watt||DaniReef LAB|
|Philips CoralCare GEN2 2020||749 €||168,5 w||4,44 euro per watt||DaniReef LAB|
|Ecotech Marine Radion XR30 G5 Blue||949 €||203 w||4,67 euro per watt||DaniReef LAB|
|Radion XR30w G2 PRO||790 €||170 w||4,7 euro per watt||Review|
|AI Hydra 32 HD||430 €||90,5 w||4,75 euro per watt||DaniReef LAB|
|Radion XR30w G4 PRO||915 €||190 w||4,84 euro per watt||Italian article|
|OceanLed Sunrise 600||870 €||180 w||4,8 euro per watt||Italian test|
|Orphek Atlantik V4||1099 €||226 w||4,9 euro per watt||Test|
|Radion XR30w G2||690 €||140 w||4,9 euro per watt||Italian review|
|Radion XR30w G4||760 €||150 w||5,1 euro per watt||Italian article|
|Aqamai LRM||465 €||87,5 w||5,1 euro per watt||DaniReef LAB|
|Zetlight UFO ZE-8000||500 €||91,5 w||5,5 euro per watt||Test|
|Reef Flare Pro L Blue||940 €||166,25 w||5,65 euro per watt||DaniReef LAB|
|Orphek iCon||1.350 €||229 w||5,89 euro per watt||DaniReef LAB|
|Aqamai LRS||289 €||47,6 w||6,1 euro per watt||DaniReef LAB|
|GNC BluRay PRO||1.149 €||140 w||8,21 euro per watt||DaniReef LAB|
|CEAB Slide & Led||2.700 €||275 w||9,8 euro per watt||Review|
|Sicce GNC 466||1.592 €||120 w||13,3 euro per watt||Review|
The ceiling light is very well built, heavy and solid. Very similar to the previous GNC AM 466 that we tested almost 10 years ago now. The price is high but the the performances are great, and most of all it has record-breaking uniformity of coverage.
The economic efficiency so it’s lower than the average, but the technical efficiency, that is the developped PAR per each watt, is very high.
What can we breed?
This is the spectral distribution (PFFD), that is the PAR value, measured at different dephts, in clear oceanic waters. These are the values:
|1 m||5 m||10 m||15 m||20 m|
So at 37 cm of distance with a GNC BluRay PRO we have 470 µmoli/M2/s, an approximate value of 14 meters below sea level. A power in the average, but that could reach even 10 meters if we consider the reflection on the glass, as you saw in the previous video.
The values are great for aquariums up to 60/65 cm of lenght, both for SPS and anything else. Obviously, some demanding SPS may need more PAR. Consider that with this ceiling light you could have the PAR values you’d have at 10 meters beyond sea level. Such power could breed everything, but you could find some limits for the coloration of the most demanding corals, but as you can see from Luper’s wonderful aquarium you can achieve incredible results. Incresing the depth the power decreases, even if not too much, to reach a wider coverage. The ceiling light is 40 cm of length, so it’s perfect for aquariums up to 60 cm and multiples. 2 for 120 cm are perfect, but they’re pretty good even on for 140 cm.
Questions and comments, as always, are very welcomed!
We really want to reserve a special thanks to our friend Luca Perini, Luper, for allowing us to play with his ceiling lights!