Thing is, when you order a small PCB, the price difference between 1 and 20units is usually negligible, so I'd try to find the light sizes for all my friends cars :D

Truth is, aftermarket lights for cars (typical AliExpress or Amazon stuff) always focus on brightness, but never on quality. It's usual for taxi drivers to have aftermarket lights in the vehicle, so you can find your money or credit card more easily, but the light quality is always terrible. :P