About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out any material, long-term or laboratory tests. The tests are carried out by 1-2 independent consumers over a period of 7-14 days. The exact test conditions can be viewed in the test plan of the respective test report – click here to go directly to the test plan.

Manufacturers provide the tested products free of charge. We charge a one-off test fee for carrying out the tests. In addition, manufacturers pay an annual licence fee for the use of the Prüfengel seal. We also receive a commission for linking to manufacturers’ websites. These remunerations have no influence on our test results or ratings.

We guarantee transparency and a fair evaluation. For a detailed insight into our comprehensive evaluation process, please click here.

Diamond Vision
Halogen car lamp H7

The Diamond Vision H7 halogen car lamp is an innovative solution for drivers looking for better visibility . This car lamp is characterized by its modern xenon look with 8500 Kelvin and offers a brightness that surpasses conventional halogen lamps. Particularly noteworthy is the long service life of this halogen car lamp, which also provides up to 100% whiter light than conventional lamps. The longer light cone enables hazards to be detected at an early stage, while the precise installation without any error messages from the on-board computer ensures smooth operation.

Advantages

✅ Modern xenon look
✅ long service life
✅ precisely fitting plugs
✅ registration-free

Disadvantages

Darker than xenon or LED headlights

The first impression

Packaging and contents

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingNo unnecessary packaging waste, no use of plastic100 points
Package contents & scopetwo H7 halogen car lamps100 points
Instructions for useProduct self-explanatory100 points
Total100 points
Weighting: 20%
*The maximum score is 100 points

The Diamond Vision H7 halogen car bul bs are carefully packaged and protected with foam. The product packaging contains the two H7 halogen car bul bs in separate boxes. The packaging is sustainable as unnecessary packaging waste has been avoided and plastic has not been used. Instructions for use are not required due to the simple handling.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceAttractive design, crystal glass100 points
ProcessingVery good workmanship100 points
StabilityHigh stability100 points
Sustainability of the productNo information on sustainability, but high-quality materials, longer service life, 30-day return policy90 points
Total 98 points
Weighting: 20%
*The maximum score is 100 points
Halogen-Autolampe H7
Halogen car lamp H7

The visual appearance of the H7 halogen car bulb is appealing, the crystal glass looks high quality. The workmanship is very good, with no visible defects such as scratches, dents or unclean transitions. The lamps appear stable and make a robust impression. Although no explicit information is given on the sustainability of the product, the high-quality workmanship suggests a certain longevity. The retailer also advertises a service life that is twice as long as that of conventional halogen lamps and offers a 30-day returns policy.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
InstallationQuick and easy installation, no error message on the on-board computer100 points
BrightnessLight color 8500 k, light output 1500 lm, brighter than warm white headlights, but dimmer than xenon or LED headlights90 points
OpticsSporty look, white-bluish light, similar to xenon headlights100 points
GlareDoes not dazzle oncoming traffic100 points
CompatibilityImmediate installation thanks to E-mark, common for many car models, high beam or low beam with twin headlights100 points
Total98 points
Weighting: 45%
*The maximum score is 100 points

Installation of the H7 halogen car bulb proved to be extremely quick and easy. It was particularly pleasing that no error messages appeared in the on-board computer, which enabled smooth integration into the vehicle. With a light color of 8500 Kelvin and a luminous efficacy of 1500 lumens , the product provides a bright and clear light that clearly outperforms conventional warm white headlights. Drivers benefit from a high-contrast light that reproduces road signs, objects and obstacles in natural colors. However, it should be noted that xenon or LED headlights are still brighter and the manufacturer only advertises the xenon look . This is created by the lamp with its sporty appearance and cool white-bluish light. At the same time, it does not dazzle oncoming traffic. The product is also compatible with a wide range of vehicles and is primarily used in twin headlights for high or low beam. Thanks to the E-mark, immediate installation is possible without registration .

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we examine how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it?

CriterionRemarkScore achieved*
Price / performance ratioVery good90 points
Rating cut4.0 out of 5.0 on Amazon50 points
Total70 points
Weighting: 15%
*The maximum score is 100 points

On the Amazon platform, consumers rate the product with an average of 4.0 stars. One criticism is that the brightness is not sufficient for night-time driving, but only corresponds to a daytime running light. The sporty look of the white-bluish light, which creates a xenon light effect, is rated very positively.

Prices of up to €34 are charged on the Internet for equivalent products. Very cheap products are available from as little as €11 . The H7 halogen car bulb from Diamond Vision is therefore currently in the lower price segment with a price of €18.95. For the quality and performance received, the price-performance ratio is very good.

Overall result

WeightingScore achieved*
1. packaging & contents20% 100 points
2. product processing & appearance20%98 points
3. in the practical test45%98 points
4. price/performance & consumer ratings15%70 points
Total94 points
*The maximum score is 100 points
Halogen car lamp H7
 of the brand 
Diamond Vision
achieved
94
Points in our test and therefore passed. The test was carried out in the test period
08/23
and is stored in our database under the licence number
230614008
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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