I'm going to test the following LED bulbs (perfect light patterns):
H8 and H11 (in my case for fog lights).
- Fanless, with a copper core for heat dissipation.


In LED technology, H8 and H11 bulbs are generally compatible, both physically and in terms of light output. More LEDs don't necessarily mean better illumination, although that's often the case.
For continuous lighting (e.g., headlights or fog lights), it's best if they have a fan to dissipate heat.
For temporary lighting (e.g., static cornering lights or fog lights), a copper core for heat dissipation is sufficient.
The difference in operating temperature between the two models is very noticeable at the mounting base. With fans are preferable.
Power consumption is usually around 13 to 16W when stabilized, which generally prevents the "bulb out" warning on the dashboard or in the diagnostic system of halogen bulbs, however, this isn't always the case in a small percentage of vehicles/brands.
Remember that with good diagnostic tools, diagnoses can be modified as needed. A good diagnostic tool without a good diagnostician is like an elephant without its trunk, a lion without claws and teeth, or a religion without God. For beginner/rookie/newie in these matters, I recommend starting with something gentle like Buddhism...
In halogen bulb technology, they are generally not compatible due to the heat emitted by the H11 (55W) compared to the H8 (35W), which can melt the plastic of the housing or the headlight itself. The bulb's mounting pins usually have slight differences between H11 and H8.
- Waiting to receive a H8/H11 model with a fan.

H7 (in my case for SCLs).
- Fanless, with a copper core for heat dissipation.


The same as mentioned above for H8/H11 applies.
UPD:
- Unfortunately, for 'Bi-Xenon headlights', the base is not suitable for the SCL fixing system and the lamp is somewhat loose.
- The approved OSRAM LED lamps shown in a previous post fit perfectly here.
- With a fan for heat dissipation.


The same as mentioned above for H8/H11 applies.
UPD:
- Unfortunately, for 'Bi-Xenon headlights', the base is not suitable for the SCL fixing system and the lamp is somewhat loose.
- The approved OSRAM LED lamps shown in a previous post fit perfectly here.
XStorm.

I'll soon be receiving the LED bulbs for the front turn signals too, so I'll have 'fully' LED headlights, which in my humble opinion will be much better than the ridiculous original LED headlights on the Polo 6C/60/61/6R family... - don't be mad at me, you know I love you -.
https://www.youtube.com/watch?v=eKY8qpPmGnk&t=150s


























































