IBV Hungária Lighting and Plastic 771-Farmer

Table 1: Assessment in brief

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

Description and technical data

The LED Light “771-Farmer” tested is suitable for use in animal housings, in agricultural farm buidings and for unprotected outdoor use.

Table 2: Technical data (according to manufacturer)

* Zhaga standard, replaceable, including connecto

Resistance to ammonia

The ammonia resistance of the LED light “771-Farmer” was determined by a laboratory test with two luminaires 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:

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

Resistance to ammonia

Visual test
The comparative visual examination after the ammonia exposure has shown minor discolorations outside the luminaire housing, but no negative impact on the luminaire performance needs to be expected. A slight deformation of the case could have been caused by the continuous thermal load. 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. This has not been veryfied. 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. All determined changes were within the measurement incertainity.

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 75.6 %.

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.