Excellent bulbs! Beautiful white to off-white light (not xenon - not blueish-white LED). Nothing like the simple yellow bulbs. Outstanding!

It is exactly as described, in my opinion it is an ideal choice for someone, for example with an Italian car like Fiat or Alfa Romeo, which has a sensitive canbus and does not recognize Chinese led canbus and requires either resistors or cancelers for the small bulbs or the license plate light. The light is NOT white like LEDs but close to a 4000K look, otherwise a very good and reliable bulb.

Satisfactory brightness but they are not white as advertised.

Quite good and fair choice.

The bulb is brighter compared to the regular T10 (W5W), not of course at the levels of a LED bulb (let's not confuse those)
but they are very good in terms of illumination, I would say.

And of course, as always, with the excellent quality of PHILIPS.

Also, these bulbs have their glass made of blue crystal, not painted (beware of fake bulbs of this type).
They can be installed in other parts of the car as well.

Also, my reference to these bulbs is solely for the PHILIPS X-TREME VISION PRO 150.

I put them inside the car because the car's lighting is dimming and gradually fading, so with the LEDs it just shuts off abruptly and strangely. At first, it was quite cool white, but as time goes by, it seems to lose a bit and turn towards yellow or rather towards the middle instead of cold! I don't have an opinion on the duration as they have been installed for 1 month!
Anyway, they illuminate like the factory classic bulbs in terms of power, just cold instead of yellow!
In my opinion, if you want for headlights, use LEDs.