Modified car headlamps when how to distinguish between H1 lights or H7 lights ah H4 I can distinguish
H1 and h7 are easy to distinguish
The main difference between the two bulbs is: H1 bulb is a foot, H7 bulb is two feet of the two can not be universal. General H1 for high beam, H7 for low beam, but there are exceptions
Modeling and power socket is not the same, one foot one foot.
