H4 9003 LED Bulb 300% Brightness Directly Plug Halogen Headlamp Conversion Kits, 2 Bulbs

Regular price
$29.99 USD
Regular price
Sale price
$29.99 USD
★Summer Sales 10% OFF CODE★:  SUMMER10 Copy
Tax included.

Sku : A500-N57US-H4

This MINI SIZE H4 LED bulb has a similar design to the original halogen bulb and is extremely easy to install. With unique design and aluminum alloy material, high quality and durable, improve your driving vision and safety.

H4 LED bulb on car show

LED Replacement Bulbs for Headlight| Key Features

300% Brightness, See More Clearly

Novsight H4 LED bulbs use CSP chip to provide more lighting effects with lower power consumption, 300% brighter than ordinary halogen lamps. Provide you with a brighter field of vision and improve your driving visibility.

1:1 Bulbs size & Same Beam Pattern, Drive Safer

1:1 same beam pattern as the original halogen light, 9003 LED bulbs provide super-focused beam, further, wider and clearer vision without glare oncoming traffics.

Compact Design Body Replacement for Headlight housing| Easier Installation

LED light H4 adopts a compact lamp body design, no external driver and wiring harness are required, and is more suitable for installation in the original halogen lamp housing, true plug and play, easier installation.

Excellent performance,Less Replacement for the Forward Lights

Say goodbye to frequent replacement. 9003 led headlights with durable aluminum alloy, Unique one-piece patent design efficiently reduces the heat coming from the chips,which ensures our LED headlight bulb a longer lifespan of up to 50,000+ hours.

Built-in intelligent driver| High efficiently LED Bulbs

Efficient self-dissipation, power-saving, no fan and wireless LED headlight , fast cooling to ensure stable high light output and extends the service time to more than 30,000hrs.

Fit for 98% of the Vehicle , fit for vehicles models such as Toyota Tacoma, for Hyundai Accent, for Nissan Versa, for Honda Civic etc.


Need Canbus Decoder/ Resistor?

Novsight H4 LED headlight conversion is suitable for 98% of the cars on the market, very few cars may need a decoder to solve the decoding problem. Don't worry, we offer a two-year warranty.

H4 LED bulb VS halogen


  • Plug Type: H4 9003
  • Light Mode: Dual Beam
  • Package includes: 2 Bulbs
  • Interior/ External Driver: Interior
  • Waterproof Rate: IP67
  • Connect Type: Plug and Play


To purchase H4 LED bulbs in different sizes and wattages, please click here

If you are not sure about your headlight bulb size, click this bulb size finder.

If you are also wondering how to clean your headlights, check out this blog: How to restore old car headlights for free.

Warm Tips

  1. Our LED replaces halogen bulbs only. It does not replace HID or LED from factory.
  2. The filter system may not be 100% accurate,the bulb size may vary between trim of your vehicle and other conditions like manufacturer and aftermarket modifications.Please double check owners manual or original bulb size to confirm before placing an order.

Shipping Policy

  • Orders Handling Time within 48 hours (excluding weekends).
US/CA/UK Area Shipping Method Conditions Shipping Time Costs
USA USPS-Standard Shipping <1.2 KG 3-8 Business Day Free
USA USPS-Standard Shipping 1.2-2 KG 3-8 Business Day $6.00 
USA USPS-Standard Shipping 2.1-2.6 KG 3-8 Business Day $8.00 
USA USPS-Standard Shipping >2.6 KG 3-8 Business Day $10.00 
UK Royal Mail Tracked 48 <1.2 KG 3-8 Business Day Free
UK Royal Mail Tracked 48 1.2-2 KG 3-8 Business Day $6.00 
UK Royal Mail Tracked 48 2.1-2.6 KG 3-8 Business Day $8.00 
UK Royal Mail Tracked 48 >2.6 KG 3-8 Business Day $10.00 
CA Standard Shipping <1.2 KG 3-8 Business Day Free
CA Standard Shipping 1.2-2 KG 3-8 Business Day $6.00 
CA Standard Shipping 2.1-2.6 KG 3-8 Business Day $8.00 
CA Standard Shipping >2.6 KG 3-8 Business Day $10.00 



DUE TO COVID19: International shipping options, tracking & delivery may be impacted

We’ve improved our international shipping methods to get you faster delivery and better tracking. If you have any questions,you can send mails to us.



It is rare, but occasionally some customers may receive an invoice for duties or tariffs from their home country's customs agency.

The lights do not work properly
1.Check if the power connectors are properly
connected, and make sure that the vehicle headlight
switch is on the "ON" position.
2.Make sure that the vehicle's battery is fully
charged to supply power to the LED bulb.
3.Install the LED bulbs with the resistors (CANbus).
4.The resistor (CANbus) is polarity sensitive. If the
LED bulbs do not function properly after installation,
please reverse the resistor (CANbus) male
connector 180 degrees and try again.
One of the bulbs is not working
1.Make sure the connection is good. If one of the
bulbs still doesn't work, swap the left and right side
bulbs and test again.
2.Some series of car lights are polarity sensitive.If
the LED bulbs do not work properly after installation,
please reverse the connector 180 degrees and try
The lights flicker or flash
Install the LED bulb with the resistors (CANbus) to
resolve the issue..
A warning lamp appears on the vehicle's system dashboard.
This is a harmless side-effect of the low-wattage
LED bulbs not being recognized by the vehicle's
system and can be resolved with the installation of
an additional set of resistors (CANbus).
The light pattern is wrong after the car lights are installed
1. Check whether the lamp body is installed and
turned up and down. As H4, H13 and 9004/9007
models are installed separately from the top and the
2. Check whether the lamp body is rotated in the
correct direction and locked in place after inserting
the locking ring.
There is not enough space for installation on the passenger side
For some vehicles, such as Honda CRV 2007-2014,
the headlight assembly on the passenger side is
very close to the fuse box, so there is not enough
space to operate the bulb installation. So we need
unclip and adjust fuse box for easier access during
the installation process..
Dust cover can not be installed back
For some vehicles, the light housing dust cover can
not be installed back after installing the LED lights.
In this case, you can consult our brand customer
service to request a modified dust cover for free.
The light bulbs is
difficult to rotate in place.
For some vehicles, the light housing dust cover is
thick, which makes it difficult for LED bulbs to rotate
in place in the light housing. To solve this problem,
you need to forcefully push the LED bulbs into the
light housing and then rotate it clockwise.