Hi AZ,

We prepared a youtube video showing comparisons; Standard halogen bulb (Osram H11 bulb), Philips LED fog light, and some LED's we ordered from amazon that had high number of positive reviews against DAMA LED.
We also did a real on-road testing by driving the same course with halogen lights and with DAMA LED's installed.

They are error-free on many Audi's including B8 & B8.5 A4, S4, A5, S5, Q5, etc...
Let us know if you have any questions.

Otherwise, enjoy the video.