Zalux S.A. STRONGER TUBE G2

The LED light “STRONGER TUBE G2” from Zalux, S.A. has successfully com­pleted the DLG test for ammonia resistance and cleaning distance.

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 LED light “STRONGER TUBE G2” was operated actively in the chamber for the entirety of the test. 
No product damage was observed here. Furthermore, the cleaning distance is regarded as suitable for the cleaning of animal houses. 

Table 1: Assessment in brief

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

Description and technical Data

The tested LED light “STRONGER TUBE G2” is suitable for any usage in animal housing surroundings or for unprotected outdoor use.

Table 2: Technical data (according to manufacturer)

Resistance to ammonia

The ammonia resistance of the LED light “STRONGER TUBE G2” 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:

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.

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 at the luminaire housing. A slight bending of the end caps could be observed. 

During the test, the luminaire appeared to be sufficiently gas-tight. Nevertheless it cannot be ruled out, that a limited amount of 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.

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 reliably a minimum cleaning distance of 10 cm should always be ensured.