The Oreon Grow Light 2.1 is very compact and powerful. This means that less fixtures are needed for a desired light level, but it also means that fixtures can be placed further apart. This saves money on fixtures, installation costs and it blocks less sunlight. The Oreon Grow Light can achieve this only because of two crucial properties:
- Water cooling ensures that more high power LEDs can be put together in a single fixture while still keeping the LEDs very cool.
- Custom designed optics which ensures a uniform light distribution despite the large distance between fixtures.
Case study
A grower wants to use assimilation lighting in his greenhouse with a light level of 75 μMol/s/m2. The light uniformity has to be at least 90%. The distance between trusses is 5 meter (section size 5 meter) and the grower wants the light fixtures to be mounted to the trusses. Furthermore, the available height between the crops and the light fixtures is 2.85 meter.
Result
The LB (low blue) version of the Oreon Grow Light has an output of 1562 μMol/s. The grower wants a light level of 75 μMol/s/m2, which translates to an area of 20.82 m2 per light fixture. The distance between the trusses is 5 meter, this means that the distance along the truss between lamps has to be 20.82 / 5 = 4.16 m.
Figure 1 shows the light distribution with the Oreon custom made lens. Figure 2 shows the light distribution with a standard 120 degrees lens.
Figure 1: Resulting Light Distribution with the Oreon Custom Lens (Lamp output = 1562 μMol/s)
Figure 2: Resulting Light Distribution with the Standard 120 degrees Lens (Lamp output = 1562 μMol/s)
As can be seen, it is not possible to achieve the required 90% uniformity with the 120 degrees lens if the light fixtures have to be mounted to the trusses. In this particular case, the only option with standard optics is to decrease the output power per lamp, and mount the lamps closer to each other on C-profiles. If we put in C-profiles and use lamps that have half the output power of the Oreon Grow Light 2.1, we get the following situation:
The half power lamp has an output of 781 μMol/s. The grower wants 75 μMol/s/m2, which translates to 10.41 m2 per light fixture. The light fixtures will be hung on C-profiles in a square grid of 3.22 meters x 3.22 meters (= 10.41 m2).
The light distribution is shown in figure 3.
Figure 3: Light Distribution with half-power lamps and standard optics. Red line = truss, blue line = c-profile.
In figure 3, it can be seen that the solution with half the power output just barely reaches the 90% uniformity. This means that to reach 90% uniformity, the output per lamp has to be reduced even more and the number of lamps has to be increased as well.
Case results (>90% uniformity, height =2.85m)
Number of Oreon Grow Lights needed per hectare: 480 pcs.
Number of 120 degrees optics lights per hectare: >960 pcs.
Conclusion
When choosing the Oreon Grow Light 2.1, less light fixtures are needed while still maintaining superior uniformity. The Oreon Grow Light has a very high output per fixture because it makes use of water cooling: any passively cooled fixture cannot achieve the same output power in such a compact fixture.
In the presented case, the number of Oreon Grow Lights per hectare is less than half the number of fixtures needed with standard optics. Using standard optics will increase cost for cabling and installation, as well as adding costs for mounting the fixtures on C-profiles, which in most cases is not needed using the Oreon Grow Light 2.1.
For more information:
Lemnis Oreon
Lorentzlaan 6
3401 MX IJsselstein
Netherlands
T: +31 30 760 0660
info@lemnis-oreon.com
www.lemnis-oreon.com