Want to do light bulb business, but do not understand the light bulb, which big god can teach me!
H7, H4, H1 are more common
(H3), the indoor light, the fog lamp (H3) , Turn the lights and the like, in short, more.
Car headlamps have H1 H4 H7 fog lights have H3, small lights on the more, you can see the collective online. The The
