In this time, I would like to explain headlight bulb numbers as below.

Automotive headlight bulb numbers include h1, h3, h4,h7, h8, h9, 1156, 1157, 3156,3157 and so on.

Most of h series are all headlight bulb.

And 1156, 1157 and other headlight bulb numbers are all tail lamps, parking lamp etc.

Different headlight bulb numbers means using different parts in cars or trucks.

In order to make you clearly headlight bulb numbers, I will show you pictures as below.

I hope all people come to discuss with us headlight bulb numbers at any time.