TECH SECTION

Aqamai LRM ceiling light: PAR masurement in DaniReef LAB


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 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 reflecting the light and the same water, we found values bigger than 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 different ceiling lights.

Consumption

The measurement of the consumption was made possible thanks to the useful device RCE PM600 that can also measure the Cos(fi) (or power factor). The result is already given in watt.

Aqamai LRM consumo

The calculus of the absorbed current, that is the power, is the following one:

Ceiling light Aqamai LRM: 90,88 watt. Considering that 17 cm the ceiling light has at the middle 2.285 μmol m-2 s-1, we can guess that it will have a peak value of 25,14 μmol m-2 s-1 w-1 (PAR per watt). A higher value that the Philips CoralCare’s one, due to the choice of distribution.

The value is lower than the declared one of 100 w. Maybe it depends also on the fan rotation speed.

The comparison with other ceiling lights on the market

Recently we started to use the new Apogee’s Quantum Meter MQ-510. For this we can’t completely compare the data of other ceiling lights because before we used the probe Seneye. The Aqamai LRM is the second ceiling light with which we adopt this method, so there will come many other comparisons in the next weeks. Actually, we’ve already measured the values of the Cetus 2 (preview – in italian) and the Aqamai LRS.

But considering these two first tested ceiling lights we can do an interesting comparison anyway.

EnergyPriceConsumptionEnergy/€Energy/w
Aqamai LRM at 17 cm642.64946590,881.3827.071
Aqamai LRM at 37 cm 721.67646590,881.5527.941
Aqamai LRM at 57 cm 616.47046590,881.3266.783
Philips CoralCare at 17 cm1.858.572749190,502.4819.756
Philips CoralCare at 37 cm 1.340.533749190,50 1.7907.037
Philips CoralCare at 57 cm 933.246749190,50 1.2464.899

The energy produced per watt is more constant in the Aqamai LRM rather than in the Philips. Same for the energy per watt when we progressively move away from the release point: it’s better with the Aqamai rather than the Philips, that having the LED on the external surface lose more on the sides. At 37 cm the values are pretty comparable, but we have to remember that the Philips have twice the costs and consumption, therefore they have higher values.

Ceiling lightPARWattPrice PAR/watteuro per watt
GNC 466 696 (Seneye) 120 1.400 euro 5,8 spread 11,7
Orphek Atlantik V4 1.515 (Apogee) 226 1.099 euro 6,7 spread 4,9
Philips CoralCare 2019 2.088 (Apogee) 190 749 euro 11 spread 3,9
Maxspect Ethereal 689 (Seneye) 130 500 euro 5,3 semi-spread 3,8
Led Bars Askoll Pure Marine 237 (Apogee) 28 n.d. 8,4
Zetlight UFO ZE-8000 791 (Seneye) 91,5 500 euro 8,6 cluster 5,5
Aqamai LRM 2.285 (Apogee) 90,88 465 euro 25,14 double cluster 5,1
Aqamai LRM in livrea nera

Devices in hand, Aqamai LRM has the highest value of peak PAR per watt ever passed in our hands. The euro per watt are in the average.

Mantaining costs

The Aqamai LRM ceiling lights costs 465 euro.

The absorbed power is 90,88 watt, so the relationship cost/watt is about 5,1 euro per watt. In order to do a comparison with the other ceiling lights you can refer to this chart:

Ceiling lightPriceConsumptionRelationship euro per watt
Philips Coralcare 2019749 euro190 watt3,9 euro per wattDaniReef LAB
Maxspect Ethereal500 euro126 watt4,0 euro per wattItalian test
Radion XR30w G2 PRO
790 euro170 watt4,7 euro per wattItalian review
Radion XR30w G4 PRO915 euro190 watt4,8 euro per wattItalian article
OceanLed Sunrise 600870 euro180 watt4,8 euro per wattItalian test
Orphek Atlantik V41099 euro226 watt4,9 euro per wattTest
Radion XR30w G2690 euro140 watt4,9 euro per wattItalian review
Radion XR30w G4760 euro150 watt5,1 euro per wattItalian article
Aqamai LRM
465 euro87,5 watt5,1 euro per watt
Zetlight UFO ZE-8000500 euro91,5 watt5,5 euro per wattTest
CEAB Slide & Led2.700 euro275 watt9,8 euro per wattReview
Sicce GNC 4661.592 euro120 watt13,3 euro per wattItalian review

The ceiling light is very well built, easy to set, in particular if you want to use the preset programs. The PAR are very good especially in the middle and in terms of efficiency are perfect. Sure, they can’t compete with ceiling lights that consume twice as much, even if they have a perfect performance for their consumption. Perfect for demanding corals probably in an area of 30×30 cm, but anyway they consent to breed anything. It has a cost per watt relationship in the average and a record peak PAR per watt. What else we can ask for?

Questions and comments, as always, are welcomed. And most of all, do you like our measuring method?