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Siteco Monsun 12

DLG-APPROVED "Resistance to ammonia, cleaning distance, flicker free"

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The approval

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 impacts of animal environments. The cleaning distance test assesses the suitability for cleaning animal living areas. 

In the “Flicker-free” test – if necessary also with different dimming levels – frequencies and the modulation depth of a luminaire’s flicker is measured. Since the corresponding stressor does not apply, flicker-free light has a positive effect on animal health.

Assessment – Brief Summary

The Damp-proof luminaire “Monsun 12” from Siteco GmbH has successfully com­pleted the DLG test for ammonia resistance, cleaning distance and flicker free.
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, Damp-proof luminaire “Monsun 12” was operated actively in the chamber for the entirety of the test. No product damage was observed here.
Furthermore, a minimal cleaning distance of 10 cm was measured. 

In undimmed state, the LED Damp-proof luminaire meets the high DLG standards.

Table 1: Overview of results

DLG quality profileEvaluation*
Ammonia resistance    ++++
Preservation of the luminous flux  +++++
Flicker free “Monsun 12”, not dimmed    +++
Cleaning distance      ++++

*    DLG Evaluation range:    
+++ or better = meets, exceeds or significantly exceeds the established DLG standards
++ = meets the legal requirements for marketability,
+ = failed

The Product

Description and Technical Data

The LED Damp-proof luminaire “Monsun 12” tested is suitable for use in animal housings, in agricultural farm buidings and in covered outdoor areas.

Table 2: Technical data (according to manufacturer)

  Monsun 12* 
Technical data51FP107P430H51FP107P460H51FP10MP480H
Electrical connection   
Voltage 220 … 240V 
Frequency 50/60 Hz AC 
Rated input power22 W33 W23 … 45 W
Dimension and weight   
Length x width x height 1,590 mm x 90 mm x 88 mm 
Weight 2.5 kg 
Additional technical data   
Number of LED modules 2 
Housing material glass-fibre reinforced polyester 
Cover PMMA with stainless steel clips 
Protection rating IP 66 
Colour temperature (CCT) 4,000 K 
Control gear ECG, on-offECG, on-off Multilumen
Beam angle 140° 
Rated luminous flux3,970 lm5,800 lm4,120 … 8,070 lm
Luminous efficacy179 lm/W178 lm/W178 lm/W
Color rendering index (CRI) > 80 
Ambient temperature -35 °C … +40 °C 
Impact resistance IK 04 
Rated service life 70,000h L80B50 @ 35 °C 
dimmable no 

* There are different variants of the „Monsun 12“ which are not shown because for lack of space 

The Method

Resistance to ammonia

The ammonia resistance of the LED Damp-proof luminaire “Monsun 12” 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.

Cleaning distance

During test bench examinations of the mechanical resistance to high-pressure cleaners, the minimum cleaning distance was determined.

The minimum cleaning distance is defined as the distance between nozzle and surface when no damages can be observed at the housing surface.

The test was conducted under the conditions presented in table 3.

Table 3: Test conditions cleaning distance

Line pressure ~150 bar
Water cold, approx. 1,000 l/h, no detergents
Nozzle type Flat spray nozzle, 25°
Exposition time 1 minute
Distance 250 mm, 200 mm, 150 mm, 100 mm, 50 mm
Ambient temperature 10-20 °C

Flicker free

The frequency and modulation depth of the flicker of two test samples for each type of luminaire were ­measured and assessed at full power. If the luminaire provided is dimmable and dimming is also recommended for practical use, the above tests were also carried ot at 50 % and 10 % of the nominal power.

For all test procedures, the LED Damp-proof luminaire “Monsun 12” in the length of 1,590mm has been used. After the tests, the luminaires underwent visual examination to a reference sample that was identical in construction.

The Test Results in Detail

Resistance to ammonia

Visual test

Visual test: The comparative visual examination after the ammonia exposure has shown minor discolorations inside and outside the luminaire housing, but no negative impact on the luminaire performance needs to be expected. During the test, the luminaire appeared to be sufficiently gas-tight. Nevertheless it cannot be ruled out, that a limited amount of ammonia respectively ammonium compounds could enter the luminaire housing. Again, no negative impact on the luminaire performance needs to be expected. The defects are rated as insignificant. The examination of the manufacturer’s mounting parts didn’t also show any defects.

Gravimetric test

Weight comparisions before and after the ammonia fumigation have not shown any measurable increases or decreases in weight.

Hardness test

During the hardness test (Shore D) no measurable changes were observed. All determined changes were within the measurement incertainty.

Functional test

No defects were observed. All luminaires worked after the conducted tests. 

Preservation of the luminous flux:

After completion of the test the luminaire still had a luminous flux of 92.0 %.

Based on the results of these tested parameters, the luminaire is evaluated as resistant to ammonia. 

Cleaning distance

Even at a cleaning distance of only 10 cm, no damages to the luminaire could be observed. At no time a 
water ingress into the luminaires was noticed. In order to avoid damage to the luminaires during cleaning a minimum cleaning distance of 10 cm should always be ensured.

Flicker free

The frequency of the undimmed luminaire was 100 Hz (modulation depth 2.5 %). 


The results show that the LED Damp-proof luminaire “Monsun 12” fulfills the testing ­requirements for ammonia resistance, cleaning distance and flicker free 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 LED Damp-proof luminaire was operated both passively and actively during the ammonia fumigation in the test chamber and passed both tests successfully. 
It is also recommended in any case to keep a minimum distance of 10 cm during cleaning.

In undimmed state, the LED Damp-proof luminaire meets the DLG requirements for flicker-free operation.

Applicant and Test implementation

Manufacturer and applicant

Siteco GmbH
Georg-Simon-Ohm-Straße 50
83301 Traunreut


Phone +49 (0)8669 33-0​​​​​​​ 

Test implementation

DLG TestService GmbH, Gross-Umstadt location
The tests are conducted on behalf of DLG e.V.

DLG test framework
DLG-Approved Test “Ammonia resistance” 
(current as of 03/2021


Head of Department
Dr. Ulrich Rubenschuh

Test engineer(s)
Dipl-Ing (FH) Tommy Pfeifer *

Photometric laboratory
Photometrik GmbH
Einsteinstraße 24, 64859 Eppertshausen

*    Author


DLG TestService GmbH - Groß-Umstadt location • Max-Eyth-Weg 1 64823 Groß-Umstadt Germany • Tel.: +49(0)69 24 788-611 •