Four years ago, I imported a package of 2 bulbs 6000K & 2 ballasts from China. I bought these bulbs to replace only the previous bulbs that I had installed with the initial purchase because one burned out and the performance of the other had decreased. I would like to point out that:

1/. Their light is brighter than before, so night driving has become more comfortable.
2/. As for their beam, I tested the bulbs, as I did with the previous ones, with a friendly person driving my car initially behind me, then crossing my path with theirs, and finally moving in the opposite direction. The verdict? Unlike the previous ones, I was able to raise my headlights higher without bothering other drivers, resulting in being able to see further on the night road.
3/. The light temperature (6000K) is the ideal upgrade for those who want to upgrade from OEM 2700K, 3000K, or 4000K H7 halogen bulbs, as it makes night driving more comfortable.
4/. Their lifespan? It will definitely show... At least the first 3 months have been worry-free!

In conclusion, I would highly recommend them to you, as they are also a great value for money!