The PIAA product that I purchased were the G3 LED bulbs for H4 sockets. It works exactly as detailed within the product description, and I'm glad I got them. What mattered the most to me was the beam pattern, and I wanted a pair of LEDs to mimic closest possible to the factory halogen bulbs that I have.



Brightness was as expected; but more importantly is the usable luminance. I had to punch some holes into the headlamp rubber cap for my vehicle in order to ensure that airflow was sufficient for the active cooling to work efficiently. Other than that, after about 16 hours of usage so far I'm perfectly satisfied with it.