Don't expect much.
I put them in a machine.
On the low setting they are almost the same in intensity.
On the high setting there is a slight difference for the better.
The light is yellow, less yellow than the standard ones but still yellow.
In conclusion, no, it wasn't worth it at that price.
Another negative is the lifespan, which, okay, they mention in the specifications anyway.
Simply, with such a small difference in performance, the cost and the short lifespan hit even harder.
I wonder how they get the +200% in performance...

Definitely the brightest light one can find in a halogen bulb. The only negative is that it is more yellow than I would like. Compared to the Diamond Vision I had before, the difference in intensity and beam length is noticeable.

They are different from the regular ones but not by much. If you want the best possible halogen light then you buy these, otherwise the regular ones are much more value for money.

The reason why halogen bulbs that promise +150% and so on have a short lifespan is very simple. Their technology does not differ at all from that of regular halogen bulbs. The difference is in the filament wire. It is much thinner than that of conventional bulbs. As a result, the current passing through it encounters greater resistance. Greater resistance means greater incandescence, thus more light. However, this is also their Achilles' heel. Thinner wire burns out and breaks more easily. Especially if there are also vibrations in the car.

Perhaps the best in halogen bulbs. Beyond that, their durability (it says so as well) is not like the regular ones, but you can't have it all.

Nothing special, the same light as the common ones, the only difference is the double cost!! Definitely money wasted!

It is the most powerful halogen bulb that someone can have in their car

There is a difference with the classic bulbs, yes, but it is not impressive. I would buy it again though because even a little helps in dark paths

They are good, they illuminate much better than regular bulbs, they just cost more and no matter what you do, they burn out in 8 to 10 months. It's worth it though, regular halogens don't light up well

I put them in my car because the previous ones were not as powerful and the projectors are a bit faded.
I noticed a difference, there was an improvement in visibility, not something amazing in my case, but there are no better options in halogen.
Those who wrote negative reviews did not read the product description. They have a shorter lifespan, it's not a secret. They are not white either, they are not LED.

Quite good lighting compared to the factory ones in SKODA, unfortunately one of them burned out in 11 months, very short lifespan, I would not choose them again easily.

The bulbs are excellent. They greatly improved the car's lighting. With the regular bulbs, I had a serious lighting problem, and now with the gt200, I have lights. It remains to be seen how durable they are over time.

I personally bought them because the headlights in my car are dim and the regular ones had very low performance. Clearly, there is a big difference and I think if the headlights were normal, they would be even better!! As for the duration time, I don't have an opinion yet.

I don't know if they are worth the extra money compared to others that are "+130% - +150%" (and if there is a big difference) because I went from the regular ones I was using to these and I was satisfied with the performance and color. They do indeed illuminate further. As a first impression, they are worth it. I'm waiting to see their durability to decide if I will buy them again or go for something cheaper.
*Update after 7 months, one of them gave out. I am not satisfied with their durability. Of course, it says it from the beginning, 250 hours of durability. But you would expect them to last longer..
However, their brightness is very good. I tried some cheap Polish ones (made in China) and they are nothing compared to these. Now I found these ones from Lidl with 100%+ brightness. I think these supermarket ones are the best value for money I have ever bought in a halogen lamp.

Based on the packaging and advertising of the product, the light should be white, as you can see in the photo. However, the light is yellow

A good upgrade for my high beam. Brighter and whiter light. In the photo, it’s not very clear, but the left headlight has this bulb and emits a whiter light, while on the right I still have the old, more yellow bulb.

As for durability, I don’t know yet, I just installed them, although the high beam is not used often and usually lasts for years.
Finally, they are legal for European roads.

UPDATE 2026/Mar: The bulbs are still going strong!

I replaced the GE +130% bulbs that lasted about 3 years with little use.
I would say that these are better than the GE+130% because they illuminate for longer, I don't see any other difference.
The price is good for what you get, they are fully legal and will not bother other drivers.

They were installed in a 2008 Fiesta MK7 with projectors.
Stronger light than the previous ones I had (X-tremeVision +130%) and noticeably less yellowish.
Unfortunately, they also have a yellowish tint that is quite visible. Other than that, the light they emit seems quite good.

I see that they compare xenon with LED with halogen and specifically these ones. Put a lux meter, measure first and see the numbers, not what everyone thinks with their eye. Read the difference between LUMENS LUX and candelas. Don't let inexperienced people sell you or install in your car lamps or lighting kits of questionable performance and quality. The fact that you think you see better differs from actually seeing better.

In Opel Astra K, there is almost no difference with regular bulbs. Neither in color nor in brightness at 20 meters.