DLG ANNUAL for lighting systems

Flicker-free lighting systems

• Does the light modulation frequency meet the requirements of the respective animal?
• Measure the amplitude, waveform, frequency and modulation depth of the flickering (also at different dimming levels of different lamps of a product family).

Animal-friendliness
Even imperceptibly unstable light puts a strain on the eye muscles and nervous system of animals and disturbs the processing of sensory stimuli in the brain. Such stressors can trigger behavioural disorders.

Ammonia resistance
Simulated practical use of approx. 10 years under stable conditions. The test samples are exposed to controlled conditions for 1,500 hours in a climate chamber:

• Temperatures up to 70 °C Relative humidity up to 70 %.
• Ammonia concentration up to 750 ppm.
• The test samples are switched on and off in a sensible rhythm.

Durability
The lighting systems must withstand the special conditions of stable air containing ammonia.

Cleaning resistance
No damage or water ingress when sprayed with high-pressure cleaners:

• Spraying of critical functional areas
• Gradual reduction of the distance between the water nozzle and the surface of the test sample with constant exposure time.
• Material compatibility test with cleaning agents and disinfectants

Wear resistance
The lighting systems must withstand the stress of regular use of high-pressure cleaners with sometimes aggressive cleaning agents and disinfectants.