„The testing chamber, and the staff's approach and willingness beyond requirements — I can only recommend them.“
Tomáš Matús
Google review
Headlight Tests
We test automotive headlights and lighting systems under simulated real-world and excessive conditions that reveal their true durability. We combine vibration testing with controlled temperature and humidity, cyclic thermal tests, condensation and thermal-shock tests to ensure flawless performance throughout the product’s entire service life.
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Over 30 years of experiencein the supply & service of testing technology
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Warranty & post-warranty servicefor our own and competitors' equipment
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Training of your employeesto increase their expertise
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Accredited laboratoriesfor external tests and calibrations
Vibration with climate change
During operation, headlights face not only mechanical vibrations from driving but also temperature and humidity fluctuations. That is why we perform combined vibration tests in our laboratory, where the mechanical load is supplemented by controlled climatic conditions. This simulates the real load during vehicle operation and verifies the mechanical strength, tightness, and function of the optical and electronic parts.
Temperature-cycle resistance test
The temperature-cycle resistance test verifies how headlights cope with repeated temperature changes between defined extremes. These cycles reveal possible material fatigue, cracks, deformation, and sealing problems that could appear during long-term use in various climatic conditions.
High-temperature resistance test
In the high-temperature resistance test, we expose headlights to prolonged exposure to high temperatures in order to verify their stability, colour fastness, and the functionality of the optical and electronic components. The test simulates, for example, parking a vehicle in direct sunlight in hot climatic regions.
Condensation test
This test simulates the conditions under which moisture condensation occurs inside the headlight. We monitor whether there is any fogging of the optical parts, corrosion processes, or failures of the electrical connections. Verifying resistance to condensation is crucial for maintaining safe visibility and a long service life of the headlight.
Thermal-shock resistance test
In the thermal-shock test, headlights are exposed to abrupt temperature changes within a matter of seconds. This extreme regime simulates sudden transitions, for example from freezing weather to operating temperature after the headlights are switched on, or conversely during sudden cooling. The test reveals critical points in the material structure and design.
We'll be happy to advise you.
Ing. Radek Lovětínský
Head of the testing laboratory
What our laboratory offers
In our laboratory we perform vibration tests, including more complex combined profiles, according to standards as well as specific customer requirements. The tested samples can be actively powered during the test, controlled, or their response measured in real time. We have a fully integrated system that links the vibration equipment with a temperature and humidity chamber. We record the course of the test using the K2+ and S!MPATI software, including measurement of acceleration, temperature and humidity on the sample. The customer can be personally present throughout the entire test and monitor its course in real time.
Scope of tests
- Vibration system in combination with a climatic chamber up to 95 % r.h.
- Combined tests in the ranges –70 °C to +180 °C and 10 to 95 % r.h.
- Thermal-shock chamber with a transfer speed of up to 10 s
- Temperature change rate in the temperature chamber up to 15 K/min
- Option to prepare custom electronic control equipment
- Customer presence directly at the test
What We Test for You
VW80000 standard
We are able to test your samples in accordance with this automotive standard (formerly LV124), according to selected categories such as K-01, K-02, K03, K-08 and K-14.
Control equipment
To control the headlights, we are able to prepare an electronic control element – a flasher, which will switch the individual parts of the headlight on and off at regular intervals.
Vibration under high humidity
We also perform vibration tests under conditions of high humidity up to 95 % r.h. thanks to our unique technology for protecting the vibration system. Our chamber makes it possible to combine vibration with regulated humidity and temperature even during horizontal tests, which ordinary laboratories often do not offer.
Which standards we meet
We have extensive experience with headlight testing, whether testing to standards or to the customer’s specific requirements.
Standards
- PV1200 – Test of resistance to climate changes
- ČSN EN 60068-2-2 – Dry heat test
- ČSN EN 60068-2-14, ed. 2 – Change of temperature test
- ČSN EN 60068-2-78 – Steady-state damp heat test
- ČSN EN 60068-2-52, ed.2 – Corrosion test in a condensing atmosphere
- ČSN EN 60068-2-53 – Vibration / shock test combined with climatic phenomena
How Does It All Work?
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1
Non-binding inquiry
Tell us your testing requirements (e.g. via the inquiry form, email or phone).
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Consultation & requirements specification
We contact you and clarify the test specification and timeline.
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3
Price quotation
You receive a structured price quotation from us.
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4
Ordering
After your order we reserve the date and capacity.
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5
Delivery of samples
You deliver the samples to us in person or by courier.
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6
Performing the test
We carry out the test on the reserved date.
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Preparing the test report
After the test we send the test report electronically.
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Follow-up support
We'll gladly go through the test results with you.
Words From Our Clients
„JD Dvořák — a company where the impossible does not exist and where it is not only about work. I am glad to have the honour of working with JD Dvořák.“
Libor Pala
TRL Space Systems s.r.o.
„We have worked with JD Dvořák for a long time in testing, the rental of climatic chambers, and the service and calibration of our equipment. We value the helpfulness and professionalism of the department heads and technicians we are in regular contact with during tests and the work carried out. Our technicians also make use of training in various areas of testing, which provides both an expansion of theoretical knowledge and practical demonstrations.“
Jiri Turek
Google review
„What I greatly appreciate is the personal approach to solving every problem. Whether it concerned specific testing requirements or the need for individual consultation, I was always met with willingness and expert help that led to a smooth and efficient collaboration. For me, JD Dvořák is not only a professional company, but also an excellent partner in research and education.“
„We have worked with JD Dvořák since 2020. Since then we have completed several installations together, and throughout they have provided service and the necessary calibrations, always at the highest professional level. They have also helped us with our special requirements and we can always rely on them. Their approach is not only professional and customer-oriented, but also very human, and the cooperation is always pleasant.“
Jan Špaček
Fresenius Kabi Horatev CZ s.r.o.
„Cooperation with JD Dvořák is at an excellent level, as proven by more than 20 years of trouble-free collaboration.“
Libor Šmíd
TÜV SÜD Czech s.r.o.
„You do good work — thank you for the long-term cooperation.“
Ing. Ivan Vavrík
Bel Power Solutions s.r.o.
„Thank you for the professional cooperation so far. You are a very reliable partner for us.“
Ing. Miloslav Mensinger
Škoda Auto a.s.
Test report
This document contains key information about the tested sample and the course of the test. We provide the report in Czech or English according to your needs.
We issue both an accredited and a non-accredited test report according to customer requirements. The type of report is determined by the chosen testing standard.
- Information about the tested sample
- Place and date of the test
- Equipment used and its calibration status
- Description of the test procedure including laboratory conditions
- Graphical record of the test
- Responsible persons
- Photo documentation of samples before and after the test
Why test with us?
Expertise in the field
Not sure how to test your sample? We'll help. We have years of experience and will recommend the most suitable procedure. And if you already know exactly what you want, we'll be your partner — without unnecessary questions.
Flexibility
Our equipment covers most requirements. If something is missing, thanks to our links with manufacturers of testing technology we can often arrange even specialised equipment outside our laboratory.
Reliability & speed
You can rely on both the equipment and our arrangements. We service and calibrate everything ourselves, so we can react quickly and adapt tests to get you results as soon as possible.
Personal approach
Every job is unique to us. We always try to understand your needs and tailor the service exactly to what you expect.
We'll be happy to advise you.
Ing. Radek Lovětínský
Head of the testing laboratory
Frequently Asked Questions
During real operation, headlights are simultaneously subjected to mechanical shocks, temperature changes and humidity. Combined tests make it possible to verify whether the design withstands these conditions without failures, loss of tightness or optical defects.
The test simulates the formation of moisture inside the headlight and verifies whether fogging of the cover lens, corrosion or damage to the electrical parts occurs. This ensures safe operation even in demanding weather.
The thermal-shock test examines the resistance of the headlight to abrupt temperature changes – for example when a hot bulb is switched on in a freezing environment. This verifies the stability of the materials, the sealing and the overall design.
Yes, in addition to standard tests according to standards we also offer testing according to customer specifications. We can set up custom temperature, humidity or vibration profiles so that they best match the real operating conditions of a specific application.
