Light! We're talking about light!
Intensity and quality.
I put it in the headlights of my car and it brightened up!
And it even has the warm color that the factory installs, not the cold one that looks like an upgrade from a 90s Starlet...
In conclusion

The best choice in Led T10 lamp and 4000k. Clean lighting without being annoying and powerful at the same time as it should be!!! Excellent in everything!

Philips guarantee! There is no better product for T10 LED bulbs. No more cheap Chinese ones that you never know if they can break on you.

The description of the 4000k warm white temperature is accurate. These bulbs emit a nearly white light. Although their price is steep, I finally found the color temperature I have been searching for so long for the small ceiling lights in the car's sunshades, both for the driver and the passenger, in order to create uniform lighting inside the cabin. I hope they will last at least half as long as the packaging claims, and I will be satisfied.