Your guide to understanding car bulb numbers and making the right choice

Halogen bulbs and their replacements (LED / Xenon) It is one of the most important lighting elements in the car, and each bulb has a specific number that distinguishes it in terms of shape, size, and function. Knowing these numbers helps you choose the appropriate alternative, whether for high beams, low beams, or headlights.

Firstly: Class Bulbs H

They are the most common and widely used in headlights.

• H1: A small bulb with a metal base, often used in high beam or foglight.
• H3: It comes with an external wire for connection, often used in fog lights (Fog light).
• H4: Double beam bulb (Dual beam)That is, it contains two light threads, High/Low Beam, and is used in cars with one lens for low and high beams..
• H7: Single beam bulb (Single beam)It is used either low or high depending on the design of the lantern, and it is one of the most common.
• H8 / H9 / H11 / H16: They are all similar in design with different light power and function.
  • H8: Mostly for Vogue Lite.
  • H9: High lighting (High Beam) More powerful than H8.
  • H11: Used for Watty or Fog Light, very common in modern cars.
  • H16: Similar to H11, but more intended for Vogue Lite, with lower light temperature.

secondly: Class Bulbs 880 And 881

• Mainly used in fog lights.
• It is distinguished by its small size and black plastic base.
• The difference between 880 And 881 Mostly in the aperture angle and light intensity.

Third: Class Bulbs 9004 – 9007

• Also known as HB1, HB2, HB3… In some catalogs.
• 9004 And 9007: Double beam bulbs (High/Low Beam).
• 9005 (HB3): High beam (High Beam).
• 9006 (HB4): watt radius (Low Beam).
• Its design differs from the H series and it has a plastic base with distinctive colors (Red/Blue) To distinguish the function.

Important technical notes:

1. Compatibility: It is not possible to replace an H4 bulb with an H7 bulb, for example, because each base is different.
2. Optical heat (Kelvin): Original halogen bulbs are between 3200K (Comfortable yellow light)While LED and xenon range from 4300K ​​to 6500K (White or light blue).
3. Power (Watt): It varies depending on the type, for example, H1 and H7 usually have 55W, while H9 reaches 65W.
4. Upgrade to LED or Xenon: When switching make sure there is Heat sink Good and the bulb base matches the original.
5. Age of shelf life: Halogen is less durable than LED, but has the advantage of being cheaper and easier to replace.

Golden advice:

When purchasing a new bulb don't just rely on the number, also check the:

• Car catalog or lantern back cover (The bulb number is written on it).
• Check the voltage (12V or 24V) Depending on the type of vehicle.
• Choose reliable companies to ensure appropriate lighting intensity and longer life.