What is a 9004 LED bulb?

A 9004 LED bulb is a type of automotive headlight that uses LED technology with a 9004 base. These bulbs are commonly used for high beam and low beam headlights, depending on the vehicle’s configuration. The 9004 is a dual-filament bulb, meaning it combines both high and low beam functions in a single unit.

How is a 9004 LED bulb different from other bulbs like 9005 or 9006?

• 9004 bulbs have a dual-filament design, meaning they can serve as both high beam and low beam, while 9005 and 9006 are single-filament bulbs (either high or low beam only).
• 9004 vs 9005: The 9004 has a lower power output and is designed for dual-beam, while the 9005 is more powerful and is typically used for high beams.
• 9004 vs 9006: Similar to the 9005, the 9006 is a single-filament bulb, usually used for low beams and has a lower output compared to 9004’s dual-beam capabilities.

What color temp should I choose for 9006 LED bulbs?

The color temperature of a 9006 LED bulb is usually measured in Kelvin (K) and affects the color of the light. Common options include:

• 3,000K: Yellowish light, similar to halogen bulbs
• 4,300K: White light, commonly used for a clean, modern look
• 6,500K: Bluish-white light, similar to daylight The choice depends on your preference for brightness, aesthetics, and road visibility.

Do 9004 LED bulbs require any additional components?

Some cars, especially those with canbus systems, may require additional components like resistors or adapters to prevent flickering or error messages. Many LED manufacturers offer plug-and-play solutions, but it’s always a good idea to check your vehicle’s specific needs before installation.

Are 9004 LED bulbs compatible with projector lens headlights?

Yes, 9004 LED bulbs can be used with projector lens headlights, but it’s important to choose high-quality LED bulbs that are designed to produce a focused, consistent beam pattern. Poor-quality LEDs might result in uneven lighting or glare, reducing visibility or creating hazards for other drivers.

Why is the beam pattern of my 9004 LED bulb not correct?

• If the beam pattern is incorrect, it could be due to:
• Improper installation: Ensure the LED bulb is properly aligned in the headlight housing.
• Low-quality LEDs: Some cheaper LED bulbs have poorly designed optics, causing scattered or uneven light.
• Vehicle-specific requirements: Some vehicles may require specific bulbs or beam adjustments for optimal results.

Can 9004 LED bulbs work in cold temperatures?

Yes, 9004 LED bulbs generally perform well in cold temperatures. Unlike halogen bulbs, which can be affected by extreme cold and moisture, LED bulbs are more resilient to temperature fluctuations and are less likely to burn out in freezing conditions.

Can I replace my 9004 halogen bulbs with 9004 LED bulbs?

Yes, you can replace 9004 halogen bulbs with 9004 LED bulbs as long as the LED bulbs are compatible with your car's headlight assembly and electrical system. Ensure that the new LED bulbs fit correctly in the socket, and check if additional components, like load resistors or canbus adapters, are required to avoid issues like flickering or dashboard error warnings.