Someone else mentioned it too. For some reason, they short-circuit. Not from the beginning, at random intervals and reasons. I thought it was the bulb since I was putting one after another and it wouldn't light up. In the end, as soon as I put in a Bosch, it worked.

Their performance is excellent. However, one of them burned out after 6 months. I don't know if it was a coincidence or related to an issue unrelated to the bulb

Good German halogen light bulbs, but if you don't get LED, don't expect miracles. The only reservation I have is their lifespan, which according to the manufacturer should not be particularly long. We'll see.

I put them in the machine for an hour, they worked and then they didn't turn on and caused a short circuit in the electrical system. Maybe they were defective. I put the old ones back and everything is fine. Money wasted

I replaced a Night Racer on my motorcycle with this one.
It is a bit worse, not terrible though, it is a decent bulb. I just have the feeling that the Night Racer is better (but it also costs the same as these two).

Comfortably can be compared to similar bulbs from lidl....
Whose price is 1/3!

Finally, I have lights! At least double the intensity of light. If they withstand over time, it will be a very good purchase.

Nice lighting color, quite powerful light (although not +200% as advertised), I hope they also have durability over time.

The best thing about halogen bulbs!
I installed them in my machine 3 months ago and I am more than satisfied!

In a Honda Civic, I didn't have enough lighting, but now with these bulbs, I have twice as much good lighting on the small scale. They have been worn for 3 months.

Flawless bulb, I have changed several expensive LED and extremely expensive xenon bulbs, I drive a Mazda bt 50 and I have never had such good lighting, if they don't burn out from the vibrations, they are worth every euro I spent!

I will also agree with the comment about the large scale... but it is one of the negatives of the H4. Medium light class superior to factory halogens.

Good lighting for those who want something more than regular light bulbs, I would buy them again

Very good light on the medium scale (h4), average on the large scale.
There is a significant color difference in the medium and large scale as well.
It's difficult to have it all, so I am satisfied.