1. Introduction
Thank you for choosing NAOEVO LED Car Headlight Bulbs. This manual provides detailed instructions for the installation, operation, and maintenance of your new LED headlight bulbs. Please read this manual thoroughly before installation and use to ensure optimal performance and safety.
2. Key Features
- 1:1 Mini Design: Compact size, similar to halogen bulbs, ensuring compatibility with 99.99% of vehicles and easy installation.
- High Brightness: Up to 18000LM per pair (9000LM per bulb) with 6000K white light for superior visibility.
- Efficient Cooling System: Built-in 7500 RPM high-speed fan and 6063 Aluminum heat sink for excellent heat conduction and fast cooling.
- Intelligent Temperature Control: Integrated system automatically adjusts current to prevent overheating, ensuring safety and longevity.
- Durable Construction: Features 1.5mm double-sided copper and CSP chips for reliable performance.
- Energy Saving: Offers 60% energy saving and 200% more brightness compared to traditional halogen bulbs.
- Universal Fit: Designed for a wide range of car brands.


3. Specifications
| Attribute | Value |
|---|---|
| Power | 50W per pair (25W per bulb) |
| Lumen | 18000LM per pair (9000LM per bulb) |
| Input Voltage | DC9-16V |
| Operating Voltage | 12V |
| Working Current | 2.1A ± 0.2A |
| Chip Type | CSP Chip (3*60MIL Chip led) |
| Color Temperature | 6500K White |
| Socket Types | H4 (Hi/Lo Beam), H7, H11, 9005/HB3, 9006/HB4 (Single Beam) |
| Cooling System | Built-in 7500 RPM Fan, 6063 Aluminum Heat Sink, 1.5mm Double-sided Copper |
| Lifespan | >30000 Hours |
| Certifications | CE, DOT, RoHS |
| Car Brand Compatibility | Universal |


4. Package Contents
Your package may include one of the following configurations:
- 2 x LED Headlight Bulbs
- 1 Pair of Gloves
OR
- 2 x LED Headlight Bulbs
- 2 x 1W T10 LED Bulbs
- 1 Pair of Gloves


5. Installation Guide
The NAOEVO LED headlight bulbs are designed for easy, plug-and-play installation, often requiring no modifications. Always wear the provided gloves during installation to avoid touching the bulb surface with bare hands.
- Safety First: Ensure your vehicle's engine is off and the headlights are cool before beginning installation. Disconnect the negative terminal of your car battery for added safety.
- Access the Headlight Assembly: Open the hood and locate the back of the headlight assembly. You may need to remove a dust cover or other components to access the bulb.
- Remove Old Bulb: Disconnect the wiring harness from the existing halogen bulb. Unclip or twist to remove the old bulb from its housing.
- Insert New LED Bulb: Carefully insert the NAOEVO LED bulb into the headlight housing. Ensure it is seated correctly and securely. The 1:1 mini design ensures a direct fit in most cases.
- Secure the Bulb: Re-secure any clips or twist the bulb into place according to your vehicle's design.
- Connect Wiring: Connect the wiring harness to the new LED bulb. Ensure a firm connection.
- Test Functionality: Reconnect the car battery. Turn on your headlights to test the low beam and high beam functions. If the bulbs do not light up, try reversing the polarity of the connector (flip it 180 degrees) and re-test.
- Adjust Beam Pattern (if necessary): Some vehicles may require minor adjustments to the beam pattern after LED installation to ensure proper alignment and avoid dazzling oncoming drivers. Refer to your vehicle's owner's manual for specific adjustment procedures.
- Replace Dust Covers: Reinstall any dust covers or components removed earlier.
Note: If you encounter any difficulties, it is recommended to consult a professional automotive technician.

6. Operation
Once installed, your NAOEVO LED headlight bulbs operate like standard vehicle headlights. Use your vehicle's headlight switch to toggle between low beam and high beam (for H4 Hi/Lo beam types) or to activate single beam functions.
- Low Beam: Provides a focused light pattern for general driving, illuminating the road ahead without blinding oncoming traffic.
- High Beam: Offers maximum illumination for driving in dark conditions, extending visibility further down the road.


7. Maintenance
NAOEVO LED headlight bulbs are designed for long-term, maintenance-free operation. However, following these general guidelines can help ensure their longevity:
- Keep Clean: Periodically clean the exterior of your headlight lenses to ensure maximum light output. Use a soft cloth and mild cleaning solution.
- Avoid Direct Contact: Do not touch the LED chips with bare hands, as oils and dirt can reduce performance and lifespan. Always use gloves if handling the bulbs directly.
- Inspect Wiring: Occasionally check the wiring connections to ensure they remain secure and free from corrosion.
- Ventilation: Ensure that the headlight assembly has adequate ventilation around the bulb's cooling fan. Do not obstruct the fan or heat sink.
8. Troubleshooting
If you experience issues with your NAOEVO LED headlight bulbs, try the following:
- Bulbs Not Lighting Up:
- Check the wiring connection. Ensure it is secure.
- If the bulb does not light up, try reversing the polarity of the connector (flip it 180 degrees) and re-test.
- Verify that your vehicle's fuses for the headlights are intact.
- Flickering or Intermittent Operation:
- Ensure all connections are tight and free from corrosion.
- Some vehicles may require a CANbus decoder to prevent flickering or error messages. This is more common in European vehicles.
- Error Messages on Dashboard:
- Modern vehicles with CANbus systems may detect the lower power draw of LED bulbs as a fault. A CANbus decoder (not included) may be required to resolve this.
- Poor Beam Pattern or Glare:
- Ensure the bulbs are correctly seated and oriented in the headlight housing.
- Adjust the headlight aim if necessary. Consult your vehicle's service manual for instructions.
- Fan Noise:
- A slight fan noise is normal due to the high-speed cooling fan. If the noise is excessive or unusual, ensure the fan is not obstructed.
9. User Tips
- For optimal light output and to prevent premature wear, ensure the cooling fins of the LED bulbs are not obstructed by dust caps or other components.
- When upgrading from halogen to LED, some vehicles might benefit from a professional headlight alignment to maximize visibility and minimize glare for other drivers.
- Consider purchasing the variant that includes the 1W T10 LED bulbs for additional interior or accent lighting upgrades.
10. Warranty and Support
NAOEVO LED Headlight Bulbs come with a 2-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. For warranty claims or technical support, please contact your retailer or the NAOEVO LED Headlight Store directly.
Warranty Claim Process:
- Contact Seller: Reach out to the seller with your purchase details and a description of the issue.
- Check Items: The seller may ask you to perform some basic checks or provide photos/videos of the issue.
- Return Items to Seller: If deemed necessary, you will be instructed on how to return the defective items.
- Seller Receives Items: Once the returned items are received and inspected.
- Seller Returns A New One: A replacement product will be sent to you.

NAOEVO was founded in 2006 with the goal of bringing consumers high-quality automotive lighting products as the premium automotive lighting leader in the industry. For 16 years, NAO has developed, manufactured, and sold millions of LED headlight bulbs to thousands of domestic and foreign companies worldwide. We continue to expand our cooperation with other distributors globally.
11. Certifications
Our NAOEVO LED Headlight Bulbs are certified to meet international quality and safety standards, including:
- CE: Conforms to European health, safety, and environmental protection standards.
- DOT: Complies with U.S. Department of Transportation safety standards.
- RoHS: Restricts the use of hazardous substances in electrical and electronic products.