The H4 automotive bulb is a dual filament bulb that operates on both 6V and 12V circuits. It has a nominal power of 60/55W for 6V and 12V circuits and 75/70W for 24V circuits. The cap or base of the H4 bulb is P43t, which is a common cap used in many automotive bulbs.
H4 Light Bulb
The H4 bulb is a versatile bulb that is suitable for use in a wide range of automotive applications. It is commonly used in headlights and is known for its bright and clear light output. The H4 bulb is also known for its durability and long life, making it a popular choice among car enthusiasts and mechanics.
The remarks for the H4 bulb indicate that it is similar to the US bulb HB2 (9003) and is approved by the ECE for use in Europe. The luminous flux of the H4 bulb is 1,650/1,000 lm ±15%, which means that it provides a bright and clear light output that is suitable for use in a wide range of driving conditions.
In addition to the H4 bulb, there are other bulbs that are interchangeable with this bulb. These include the HB2 (9003) bulb, which is commonly used in the US, and the H7 bulb, which is widely used in Europe. These bulbs have similar specifications and can be used interchangeably in many automotive applications.
Overall, the H4 bulb is a reliable and high-quality automotive bulb that is suitable for use in a wide range of applications. It provides a bright and clear light output that is essential for safe driving, and its durability and long life make it a popular choice among car enthusiasts and mechanics.