A test mark “DLG-APPROVED for individual criteria” is awarded for agricultural products which have successfully fulfilled a scope-reduced usability testing conducted by DLG according to independent and recognized evaluation criteria. The test is intended to highlight particular innovations and key criteria of
the test object. The test may contain criteria from the DLG test scope for overall tests, or focus on other value-determining characteristics and properties of the test subject. The minimum requirements, test conditions and procedures as well as the evaluation bases of the test results will be specified in consultation with an expert group of DLG. They correspond to the recognized rules of technology, as well as scientific and agricultural knowledge and requirements. The successful testing is concluded with the publication of a test report, as well as the awarding of the test mark which is valid for
five years from the date of awarding.
The ammonia resistance test was performed as a laboratory test according to the patented DLG test standard. This test is intended to determine the suitability of equipment for animal living areas to withstand the impact of animal environments.
Other critera have not been assessed.
The moisture-proof diffuser luminaire AMPHIBIA PM has successfully completed the DLG test for ammonia resistance. According to this result, it can be assumed that these luminaires are resistant to the typical environmental conditions of animal living areas and that no accelerated reduction of the product lifetime will occur. In addition, the moisture-proof diffuser luminaire AMPHIBIA PM was operated actively in the chamber for the entirety of the test. No product damage was observed here.
|DLG QUALITY PROFILE||Evaluation*|
|Preservation of the luminous flux|
* The DLG test framework provides the following options in its evaluation schemes:
■ ■ ■ or better = meets, exceeds or clearly exceeds the specified DLG standard, ■ ■ = meets the legal requirements for marketability, ■= failed
Description and technical data
The moisture-proof diffuser luminaire AMPHIBIA PM tested here is suitable for use in animal living areas. The material of the housing consists of PMMA.
|Rated input power||31 W|
|Dimension and weight|
|Width/length||92 mm/1,110 mm|
|Additional technical data|
|Number of LED modules||2|
|Colour temperature (CCT)||4000 K|
|Light angle||Wide Beam|
|Luminous efficacy||149 lm/W|
Resistance to ammonia
The ammonia resistance of the moisture-proof diffuser luminaire AMPHIBIA PM was determined by a laboratory test with one luminaire according to the patented DLG test standard for agricultural use. The laboratory test is designed to replicate the conditions of a usage period of about 10 years exposure
to animal living areas.
The test was carried out in a climate chamber under the following climate conditions:
|Test duration||1500 h|
|Air temperature||70 °C|
|Relative humidity||70 %|
|Ammonia concentration||750 ppm|
For assessing the ammonia resistance, each luminaire was examined visually, gravimetrically and the plastic parts additionally through measurement of the hardness (Shore D) before and after the climate testing.
The luminaires have additionally been following a cycle of operation predefined by DLG (3 hours on, 1 hour off) in order to evaluate any thermal impacts caused by switch-on and -off procedures during ammonia fumigation. Furthermore the luminous flux was measured according to DIN EN 13032 before and after the fumigation in order to get additional information regarding the aging process.
In order to avoid overheating (> 70 °C), the luminaires could be operated at a reduced power level during the testing period.
For the approval of all luminaires in table 2, the moisture-proof diffuser luminaire “AMPHIBIA AMP S 4600-840 PM WB EVG, 1.1 m long” has been used. After the tests, the luminaires underwent visual examination to a reference sample that was identical in construction.
Resistance to ammonia
The comparative visual examination after the ammonia exposure has shown minor discolorations at the inside of the luminaire housing. There were few discolorations on the outside of the housing. The deformation at the housing kept within limits.
It cannot be ruled out that a limited ammount of ammonium compounds might enter the luminaire housing.
Also in this case, no negative impact on the luminaire performance needs to be expected.
The defects are rated as insignificant.
Weight comparisions before and after the ammonia fumigation have not shown any measurable increases
or decreases in weight.
During the hardness test (Shore D) no measurable changes were observed. All determined changes were within the measurement incertainty.
No defects were observed. All luminaires worked well after the conducted tests.
Preservation of the luminous flux
After completion of the test the luminaire still had a luminous flux of 95.5 %.
Based on the results of these tested parameters, the luminaire is evaluated as resistant to ammonia.
The results show that the moisture-proof diffuser luminaire AMPHIBIA PM fulfills the testing requirements for ammonia resistance and thus receives the test mark DLG-Approved. It can be expected that the luminaire is resistant to ammonical air in animal living areas and that no accelerated reduction of the product lifetime occurs. The moisture-proof diffuser luminaire AMPHIBIA PM was operated both passively and actively during the ammonia fumigation in the test chamber and passed both tests successfully.Other critera have not been assessed.
Zumtobel Lighting GmbH
Schweizer Strasse 30
DLG TestService GmbH, Gross-Umstadt location, Germany
The tests are conducted on behalf of DLG e.V.
DLG test scope
DLG-approved single criteria test
“Leuchtsysteme in Ställen“ (current as of 03/2021)
Dr. Ulrich Rubenschuh
Dipl-Ing (FH) Tommy Pfeifer *
Photometrik GmbH, Einsteinstraße 24
64859 Eppertshausen, Germany