some places do not sell H4 labled lights.but they are rate in
different numbers..such as 90??
so..exactly H4=9003 ???is that right??
can someone tell me..as i am going to buy that soon...
thank u

 

do you mean 9005 for high beam?

 

H4 also are sold as 9003. The only difference is that 9003 are meant for US market (DOT), being that true 9003 are only sold in 55/60 watt versions (that I have seen).

I have purchased MANY H4 bulbs, and if you are looking for looks and good visability, I had FANTASTIC results with the PIAA Super Plasma H4 bulb. They lasted more than 5 years and deliver very good light compared to other bulbs, and personally think light is better over stock (even though technically lumens are less). I got 55/60 cuz I melted my wiring harness w/ 80/100 bulbs (non-PIAA)

But yes, H4=9003 ......