It’s my pleasure to explain you h3 vs h4 bulb in brief.

H3 is very different from h4 bulb.

Because h3 is single filament and h4 bulb is double filaments.

Meanwhile, h3 is pk22s and h4 bulb is P43t.

I will show you pictures of h3 and h4 bulb as below.

All of our h3 and h4 bulb are longer life time.

Welcome all people come to visit our h3 vs h4 bulb at any time.