H7 and 9006 are two distinct types of headlight bulbs that are not interchangeable due to their different specifications and designs. While both are commonly used in automotive lighting, they have several key differences that set them apart.

Base and Socket

The most significant difference between H7 and 9006 bulbs lies in their base and socket configurations. H7 bulbs feature a PGJ19-2 base, while 9006 bulbs have a P22d 90° base. This fundamental difference means that these bulbs cannot be used interchangeably in vehicle headlight systems.

Dimensions and Connectors

H7 and 9006 bulbs also differ in their physical dimensions and connector designs:

  • H7 bulbs have pins positioned closer together
  • 9006 bulbs have a different pin arrangement
  • H7 connectors feature tabs on their ends, which are absent in 9006 connectors

These variations in size and connection method further emphasize that these bulbs are not compatible with each other's sockets.

Brightness and Power Consumption

While both bulbs are used for low-beam headlights and fog lights, they differ in their light output and power consumption:

  • 9006 bulbs typically produce around 1000 lumens
  • H7 bulbs are generally brighter, producing about 1350 lumens
  • Both H7 and 9006 halogen bulbs usually consume 55 watts of power

Lifespan

The average lifespan of these bulbs also varies:

  • H7 halogen bulbs have a lifespan of approximately 270 hours
  • 9006 halogen bulbs tend to last longer, with a lifespan of about 1000 hours

Primary Applications

While both bulbs can be used for low-beam headlights and fog lights, they are often employed in different configurations:

  • H7 bulbs are commonly used in European vehicle models
  • 9006 bulbs are frequently found in American and Japanese vehicles

Cross-References

It's important to note the cross-references for these bulbs:

  • 9006 is also known as HB4
  • H7 is cross-referenced with H8, H9, and H16 bulb sizes

In conclusion, while H7 and 9006 bulbs may seem similar at first glance, they are distinctly different and cannot be used interchangeably. When replacing headlight bulbs, it's crucial to use the correct type specified for your vehicle to ensure proper fit and optimal performance.