Curious about 9003/H4 bulbs? This article aims to provide an in-depth overview of 9003/H4 bulbs. We will explore what 9003/H4 bulbs are, how they compare to other bulb types, their specifications and applications,

If you’re looking to upgrade to LED headlight bulbs, SEALIGHT’s line of 9003/H4 LED bulbs is worth considering. They are designed specifically to replace your factory 9003 bulbs, providing maximum brightness for safe nighttime driving

9003 Bulb Explained

What is 9003 bulb?

The 9003 bulb is a type of halogen bulb found in the headlights in various cars and motocycles. It is a dual-filament bulb that can provides both high beam and low beam functionality within a single headlight unit.

9003 and H4 bulb comparison and compatibility

H4 is a classification under the European ECE regulation. It refers to the dual-filament headlight bulb with the same specifications as the 9003 bulb.

So, the 9003 and H4 bulb share the same specifications and are interchangeable. Some brands may label them as either 9003 or H4.

H4 bulbs are not inherently brighter than 9003 bulbs.

To learn more about this topic, check this guide: 9003 vs. H4 Headlight Bulbs: Are They The Same?

Specifications of 9003/H4 bulb

Lumens - A 9003 halogen bulb typically produces around 1,000 to 1,500 lumens, depending on the wattage and manufacturer.

Watts - A 9003 bulb typically has a wattage rating of 55 watts for the low beam filament and 60 watts for the high beam filament.

Lifespan - The halogen 9003 bulbs have a lifespan of 300 to 500 hours or so.

9003 h4 halogen bulb front
9003 h4 halogen bulb

9003 H4 halogen bulb

Which cars use 9003/H4 bulbs?

Many cars, motorcycles, and trucks use H4 bulbs for their headlights. Some popular vehicle models using H4 bulbs include certain BMW, Chevrolet, Kia, Ford, Gas Gas, Harley Davidson, Yamaha, Honda, Subaru models, etc.

Note: Always check your owner's manual or consult a professional before purchasing replacement bulbs. Professional automotive lighting store like SEALIGHT offers car bulb finder tool to help you find the right bulb size quickly.

You may like: What Headlight Bulb Do I Need? Guide to Find the Right Headlight Bulb

9003/H4 bulb Comparison and Replacement Problems

Is H4 and HB4 the same?

No, H4 and HB4 (or 9006) are not the same. H4 is a dual-filament bulb, while HB4 is a single-filament bulb typically used for low beam headlights or fog lights. You can check this guide to learn more about HB4/9006 bulbs and the best LED options.

Which bulb is better: H4 or H7?

H7 bulbs are a different type for specific vehicle applications. So the better choice between H4 and H7 bulbs depends on your vehicle's compatibility. The H4 bulb is a dual-filament bulb ((high and low beam in the same bulb) while the H7 bulb is the single filament bulb (separate bulbs for high and low beam).

What is the longest lasting H4 bulb?

Long-lasting H4 bulbs are available from various manufacturers. At SEALIGHT, the longest-lasting H4 bulb is SEALIGHT X5 9003 H4 and SEALIGHT S7 9003 H4 LED Headlight Bulbs, boosting a lifespan of over 60,000 hours.

How many watts is an LED H4?

LED H4 bulbs typically consume less power than halogen bulbs. They can range from 20 watts to 50 watts, with higher wattage generally producing more light output.

How to Install 9003 H4 LED Headlight Bulbs?

Changing those faded 9003/H4 halogen headlight bulbs for crisp new LEDs can be done in no time. Watch the video below for a step-by-step guide on replacing H13/9008 LED headlight bulbs, or explore our LED bulb installation manuals for more details.

Which 9003 H4 LED Bulb Is The Best? - (2025)SEALIGHT 9003 LEDs Recommended

SEALIGHT 9003 H4 LED headlight bulbs offer exceptional brightness, reliability, and safety. In this section, we will introduce SEALIGHT's top 9003 H4 LED headlight bulb options. Now let's look at the key features and benefits of each model.

Brightest H4 9003 LED Bulbs – SEALIGHT S7S Series

For those seeking maximum brightness, the SEALIGHT S7S H4 9003 is the ultimate choice. These high-power LED bulbs deliver an astonishing 33,000 lumens, making night driving significantly safer and more comfortable. Whether you’re navigating dark rural roads or dealing with unpredictable wildlife crossings, the crisp, clear light output ensures enhanced visibility. Even compared to HID bulbs, the S7S LEDs stand out with superior brightness.

Additionally, these bulbs feature high-power auto decoding, eliminating dashboard error messages commonly seen with aftermarket LEDs. With wireless installation, replacing your old bulbs is a hassle-free process that takes just three minutes. The S7S Series also boasts an impressive 7-year lifespan, reducing the need for frequent replacements.

Most Popular H4 9003 LED Bulbs – SEALIGHT S1 Series

If you're looking for a well-balanced LED headlight bulb with great performance at a reasonable price, the SEALIGHT S1 H4 9003 is a go-to option. Offering 13,000 lumens per set and a 6500K bright white color temperature, these bulbs provide a noticeable upgrade from stock halogens without being overly intense.

The S1 Series features an IP67 waterproof rating, ensuring reliable performance in various weather conditions. Additionally, with a 5,000-hour lifespan, these bulbs deliver long-lasting durability. The external power supply ensures stable illumination, while the passive cooling method maintains efficiency without the need for an integrated fan.

Most Efficient H4 9003 LED Bulbs – SEALIGHT X1 Series

For drivers prioritizing efficiency and longevity, the SEALIGHT X1 H4 9003 offers an excellent combination of brightness and durability. These bulbs provide a 6000K daylight white color temperature, ensuring a clear and natural-looking beam pattern. Unlike some high-output LEDs that may cause glare, the X1 Series offers a focused beam that enhances visibility without blinding oncoming drivers.

One of the standout features of the X1 Series is its fanless design, which eliminates noise while maintaining an advanced heat sink system for optimal cooling. This contributes to an incredible 50,000-hour lifespan, making it one of the longest-lasting options on the market. Whether you’re commuting daily or frequently driving at night, the X1 Series is a reliable and cost-effective choice.

Last words

Driving at night can be challenging without proper headlights. At SEALIGHT, we offer premium yet affordable LED headlight bulb upgrades to ensure maximum visibility and safety after dark. Experience worry-free nighttime driving and adventure with SEALIGHT. Plus, shipping is on us for every order.