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Xenon Arc test

The Xenon Arc test (Weatherometer): test the lightfastness of your material

The Xenon Arc test (also known as Weatherometer or WOM test) is the most reliable test for simulating the long-term influence of sunlight and moisture on (the coating of) a product. Unlike the QUV test, the Xenon Arc test uses the full spectrum of sunlight. It simulates both UVA and UVB and visible light with a Xenon lamp.

Want to check your coating’s resistance to aging from light with the Xenon Arc test?

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This is what the Xenon Arc test measures

The Xenon Arc test is a weathering test and is used to check the resistance to (sun) light, moisture and heat. This is also known as lightfastness. The test is particularly intended for products that are (frequently) used outdoors, such as cladding, transport equipment, patio furniture and outdoor lamps. For indoor application, the test can be customized with special filters that ensure the light has the same composition as light entering through a window.

This weathering test simulates the effects of sun and moisture on a coating over several weeks.

The difference between the QUV test and the Xenon Arc test

The light from the Xenon lamp corresponds to daylight in terms of wavelength better than the light from the QUV test. To simulate daylight even better, a daylight or glass filter can also be used during the Xenon Arc test. This makes the correlation with practice even better.

Want to know which test applies to your product?

These materials are suitable

This Xenon Arc test is for:

  • Coatings on all possible substrates;
  • Plastics without a coating.

Want to have another material tested? Then call 013 – 463 06 88 for the possibilities.

The Xenon Arc test meets these quality standards

We can perform the Xenon Arc test according to many different standards. For plastics, the most commonly applied standard is ISO 4892-2, for coatings it is ISO 16474-2. For leather and textiles, we typically apply ISO 4892-2 ISO 105-B02, ISO 105-B04 and a host of ASTM standards.


Based on the specific quality standard, we expose the test material in a climate chamber to light that mimics practice as closely as possible. For this we use special Xenon Arc lamps that emit light with the correct wavelength. The temperature here is set according to the quality standard.

It is also possible to spray demineralized water on the test products in a controlled manner in the climate chamber to simulate rain and rapid cooling.

Test duration of the Xenon Arc test

he correlation between the Xenon Arc test and practice depends on several factors, including the type of material and application of the product. We can only determine that exact correlation when we have field data that we can compare with laboratory results.

In theory, 500 hours of testing with artificial weathering roughly corresponds to a year of sunlight, heat and moisture in Western Europe.

Please note that this is only a rule of thumb. Please contact the specialists at M2lab for advice on the test duration relevant to your situation and product.

Reporting and advice

Within five business days of completing the Xenon Arc test, you will receive a report with the results. After reading the report, you may still need advice on how to improve the quality of the product. As specialists in the field of industrial surface treatment, our employees always have advice to help you with this.

Call +31 (0)13 463 06 88 for more information on turnaround times for your required laboratory tests.

Want to have your product tested to the ISO 4892-2 or 16474-2 standard?